Multiple front-end fixes (#2247)

Fixes:
* Sanitize user-provided content in HTML (Fixes #2193)
* Fix encoding of search query in prev/next pages (Fixes #2229)
* Fix some issues introduced with #2196:
   - Fix alignment of all <h3> elements (Move the inline style from the parent to the <h3> element)
   - Add missing comma on 'dir' HTML attribute (Typo introduced by PR #2196)

Code cleaning:
* Remove unnecessary 'each_sclice' + 'each' double loop in ECR files
* Clean the player's <source> list generation code (in player.ecr)

19 files changed, 161 insertions, 169 deletions

diff --git a/src/invidious/comments.cr b/src/invidious/comments.cr
index 81d6ac2b..8877f52b 100644
--- a/src/invidious/comments.cr
+++ b/src/invidious/comments.cr
@@ -312,6 +312,8 @@ def template_youtube_comments(comments, locale, thin_mode, is_replies = false)
         author_thumbnail = ""
       end
 
+      author_name = HTML.escape(child["author"].as_s)
+
       html << <<-END_HTML
       <div class="pure-g" style="width:100%">
         <div class="channel-profile pure-u-4-24 pure-u-md-2-24">
@@ -320,7 +322,7 @@ def template_youtube_comments(comments, locale, thin_mode, is_replies = false)
         <div class="pure-u-20-24 pure-u-md-22-24">
           <p>
             <b>
-              <a class="#{child["authorIsChannelOwner"] == true ? "channel-owner" : ""}" href="#{child["authorUrl"]}">#{child["author"]}</a>
+              <a class="#{child["authorIsChannelOwner"] == true ? "channel-owner" : ""}" href="#{child["authorUrl"]}">#{author_name}</a>
             </b>
             <p style="white-space:pre-wrap">#{child["contentHtml"]}</p>
       END_HTML
diff --git a/src/invidious/views/authorize_token.ecr b/src/invidious/views/authorize_token.ecr
index 8ea99010..2dc948d9 100644
--- a/src/invidious/views/authorize_token.ecr
+++ b/src/invidious/views/authorize_token.ecr
@@ -9,13 +9,13 @@
                 <%= translate(locale, "Token") %>
             </h3>
         </div>
-        <div class="pure-u-1-3" style="text-align:center">
-            <h3>
+        <div class="pure-u-1-3">
+            <h3 style="text-align:center">
                 <a href="/token_manager"><%= translate(locale, "Token manager") %></a>
             </h3>
         </div>
-        <div class="pure-u-1-3" style="text-align:right">
-            <h3>
+        <div class="pure-u-1-3">
+            <h3 style="text-align:right">
                 <a href="/preferences"><%= translate(locale, "Preferences") %></a>
             </h3>
         </div>
diff --git a/src/invidious/views/channel.ecr b/src/invidious/views/channel.ecr
index dd2807de..09cfb76e 100644
--- a/src/invidious/views/channel.ecr
+++ b/src/invidious/views/channel.ecr
@@ -1,6 +1,9 @@
+<% ucid = channel.ucid %>
+<% author = HTML.escape(channel.author) %>
+
 <% content_for "header" do %>
-<title><%= channel.author %> - Invidious</title>
-<link rel="alternate" type="application/rss+xml" title="RSS" href="/feed/channel/<%= channel.ucid %>" />
+<title><%= author %> - Invidious</title>
+<link rel="alternate" type="application/rss+xml" title="RSS" href="/feed/channel/<%= ucid %>" />
 <% end %>
 
 <% if channel.banner %>
@@ -17,12 +20,12 @@
     <div class="pure-u-2-3">
         <div class="channel-profile">
             <img src="/ggpht<%= URI.parse(channel.author_thumbnail).request_target %>">
-            <span><%= channel.author %></span>
+            <span><%= author %></span>
         </div>
     </div>
-    <div class="pure-u-1-3" style="text-align:right">
+    <div class="pure-u-1-3">
         <h3 style="text-align:right">
-            <a href="/feed/channel/<%= channel.ucid %>"><i class="icon ion-logo-rss"></i></a>
+            <a href="/feed/channel/<%= ucid %>"><i class="icon ion-logo-rss"></i></a>
         </h3>
     </div>
 </div>
@@ -34,15 +37,13 @@
 </div>
 
 <div class="h-box">
-    <% ucid = channel.ucid %>
-    <% author = channel.author %>
     <% sub_count_text = number_to_short_text(channel.sub_count) %>
     <%= rendered "components/subscribe_widget" %>
 </div>
 
 <div class="pure-g h-box">
     <div class="pure-u-1-3">
-        <a href="https://www.youtube.com/channel/<%= channel.ucid %>"><%= translate(locale, "View channel on YouTube") %></a>
+        <a href="https://www.youtube.com/channel/<%= ucid %>"><%= translate(locale, "View channel on YouTube") %></a>
         <div class="pure-u-1 pure-md-1-3">
             <a href="/redirect?referer=<%= env.get?("current_page") %>"><%= translate(locale, "Switch Invidious Instance") %></a>
         </div>
@@ -55,12 +56,12 @@
             <% if channel.auto_generated %>
                 <b><%= translate(locale, "Playlists") %></b>
             <% else %>
-                <a href="/channel/<%= channel.ucid %>/playlists"><%= translate(locale, "Playlists") %></a>
+                <a href="/channel/<%= ucid %>/playlists"><%= translate(locale, "Playlists") %></a>
             <% end %>
         </div>
         <div class="pure-u-1 pure-md-1-3">
             <% if channel.tabs.includes? "community" %>
-                <a href="/channel/<%= channel.ucid %>/community"><%= translate(locale, "Community") %></a>
+                <a href="/channel/<%= ucid %>/community"><%= translate(locale, "Community") %></a>
             <% end %>
         </div>
     </div>
@@ -72,7 +73,7 @@
                     <% if sort_by == sort %>
                         <b><%= translate(locale, sort) %></b>
                     <% else %>
-                        <a href="/channel/<%= channel.ucid %>?page=<%= page %>&sort_by=<%= sort %>">
+                        <a href="/channel/<%= ucid %>?page=<%= page %>&sort_by=<%= sort %>">
                             <%= translate(locale, sort) %>
                         </a>
                     <% end %>
@@ -87,17 +88,15 @@
 </div>
 
 <div class="pure-g">
-    <% items.each_slice(4) do |slice| %>
-        <% slice.each do |item| %>
-            <%= rendered "components/item" %>
-        <% end %>
-    <% end %>
+<% items.each do |item| %>
+    <%= rendered "components/item" %>
+<% end %>
 </div>
 
 <div class="pure-g h-box">
     <div class="pure-u-1 pure-u-lg-1-5">
         <% if page > 1 %>
-            <a href="/channel/<%= channel.ucid %>?page=<%= page - 1 %><% if sort_by != "newest" %>&sort_by=<%= HTML.escape(sort_by) %><% end %>">
+            <a href="/channel/<%= ucid %>?page=<%= page - 1 %><% if sort_by != "newest" %>&sort_by=<%= HTML.escape(sort_by) %><% end %>">
                 <%= translate(locale, "Previous page") %>
             </a>
         <% end %>
@@ -105,7 +104,7 @@
     <div class="pure-u-1 pure-u-lg-3-5"></div>
     <div class="pure-u-1 pure-u-lg-1-5" style="text-align:right">
         <% if count == 60 %>
-            <a href="/channel/<%= channel.ucid %>?page=<%= page + 1 %><% if sort_by != "newest" %>&sort_by=<%= HTML.escape(sort_by) %><% end %>">
+            <a href="/channel/<%= ucid %>?page=<%= page + 1 %><% if sort_by != "newest" %>&sort_by=<%= HTML.escape(sort_by) %><% end %>">
                 <%= translate(locale, "Next page") %>
             </a>
         <% end %>
diff --git a/src/invidious/views/community.ecr b/src/invidious/views/community.ecr
index 96976271..15d8ed1e 100644
--- a/src/invidious/views/community.ecr
+++ b/src/invidious/views/community.ecr
@@ -1,5 +1,8 @@
+<% ucid = channel.ucid %>
+<% author = HTML.escape(channel.author) %>
+
 <% content_for "header" do %>
-<title><%= channel.author %> - Invidious</title>
+<title><%= author %> - Invidious</title>
 <% end %>
 
 <% if channel.banner %>
@@ -16,7 +19,7 @@
     <div class="pure-u-2-3">
         <div class="channel-profile">
             <img src="/ggpht<%= URI.parse(channel.author_thumbnail).request_target %>">
-            <span><%= channel.author %></span>
+            <span><%= author %></span>
         </div>
     </div>
     <div class="pure-u-1-3" style="text-align:right">
@@ -33,8 +36,6 @@
 </div>
 
 <div class="h-box">
-    <% ucid = channel.ucid %>
-    <% author = channel.author %>
     <% sub_count_text = number_to_short_text(channel.sub_count) %>
     <%= rendered "components/subscribe_widget" %>
 </div>
@@ -79,7 +80,7 @@
 <script id="community_data" type="application/json">
 <%=
 {
-    "ucid" => channel.ucid,
+    "ucid" => ucid,
     "youtube_comments_text" => HTML.escape(translate(locale, "View YouTube comments")),
     "comments_text" => HTML.escape(translate(locale, "View `x` comments", "{commentCount}")),
     "hide_replies_text" => HTML.escape(translate(locale, "Hide replies")),
diff --git a/src/invidious/views/components/item.ecr b/src/invidious/views/components/item.ecr
index 7fbefc38..68aa1812 100644
--- a/src/invidious/views/components/item.ecr
+++ b/src/invidious/views/components/item.ecr
@@ -30,7 +30,7 @@
                 <p dir="auto"><%= HTML.escape(item.title) %></p>
             </a>
             <a href="/channel/<%= item.ucid %>">
-                <p dir=auto"><b><%= HTML.escape(item.author) %></b></p>
+                <p dir="auto"><b><%= HTML.escape(item.author) %></b></p>
             </a>
         <% when MixVideo %>
             <a href="/watch?v=<%= item.id %>&list=<%= item.rdid %>">
@@ -45,7 +45,7 @@
                 <p dir="auto"><%= HTML.escape(item.title) %></p>
             </a>
             <a href="/channel/<%= item.ucid %>">
-                <p dir=auto"><b><%= HTML.escape(item.author) %></b></p>
+                <p dir="auto"><b><%= HTML.escape(item.author) %></b></p>
             </a>
         <% when PlaylistVideo %>
             <a style="width:100%" href="/watch?v=<%= item.id %>&list=<%= item.plid %>">
@@ -77,7 +77,7 @@
 
             <div class="video-card-row flexible">
                 <div class="flex-left"><a href="/channel/<%= item.ucid %>">
-                    <p class="channel-name" dir=auto"><%= HTML.escape(item.author) %></p>
+                    <p class="channel-name" dir="auto"><%= HTML.escape(item.author) %></p>
                 </a></div>
             </div>
 
@@ -139,7 +139,7 @@
 
             <div class="video-card-row flexible">
                 <div class="flex-left"><a href="/channel/<%= item.ucid %>">
-                    <p class="channel-name" dir=auto"><%= HTML.escape(item.author) %></p>
+                    <p class="channel-name" dir="auto"><%= HTML.escape(item.author) %></p>
                 </a></div>
                 <div class="flex-right">
                     <div class="icon-buttons">
diff --git a/src/invidious/views/components/player.ecr b/src/invidious/views/components/player.ecr
index c37d20d5..03252418 100644
--- a/src/invidious/views/components/player.ecr
+++ b/src/invidious/views/components/player.ecr
@@ -10,17 +10,22 @@
             <% audio_streams.each_with_index do |fmt, i| %>
                 <source src="/latest_version?id=<%= video.id %>&itag=<%= fmt["itag"] %><% if params.local %>&local=true<% end %>" type='<%= fmt["mimeType"] %>' label="<%= fmt["bitrate"] %>k" selected="<%= i == 0 ? true : false %>">
             <% end %>
-          <% else %>
+        <% else %>
             <% if params.quality == "dash" %>
                 <source src="/api/manifest/dash/id/<%= video.id %>?local=true&unique_res=1" type='application/dash+xml' label="dash">
             <% end %>
 
-            <% fmt_stream.each_with_index do |fmt, i| %>
-                <% if params.quality %>
-                    <source src="/latest_version?id=<%= video.id %>&itag=<%= fmt["itag"] %><% if params.local %>&local=true<% end %>" type='<%= fmt["mimeType"] %>' label="<%= fmt["quality"] %>" selected="<%= params.quality == fmt["quality"] %>">
-                <% else %>
-                    <source src="/latest_version?id=<%= video.id %>&itag=<%= fmt["itag"] %><% if params.local %>&local=true<% end %>" type='<%= fmt["mimeType"] %>' label="<%= fmt["quality"] %>" selected="<%= i == 0 ? true : false %>">
-                <% end %>
+            <%
+            fmt_stream.each_with_index do |fmt, i|
+                src_url  = "/latest_version?id=#{video.id}&itag=#{fmt["itag"]}"
+                src_url += "&local=true" if params.local
+
+                quality = fmt["quality"]
+                mimetype = fmt["mimeType"]
+
+                selected = params.quality ? (params.quality == quality) : (i == 0)
+            %>
+                <source src="<%= src_url %>" type="<%= mimetype %>" label="<%= quality %>" selected="<%= selected %>">
             <% end %>
         <% end %>
 
diff --git a/src/invidious/views/edit_playlist.ecr b/src/invidious/views/edit_playlist.ecr
index bd8d6207..5046abc1 100644
--- a/src/invidious/views/edit_playlist.ecr
+++ b/src/invidious/views/edit_playlist.ecr
@@ -1,14 +1,16 @@
+<% title = HTML.escape(playlist.title) %>
+
 <% content_for "header" do %>
-<title><%= playlist.title %> - Invidious</title>
+<title><%= title %> - Invidious</title>
 <link rel="alternate" type="application/rss+xml" title="RSS" href="/feed/playlist/<%= plid %>" />
 <% end %>
 
 <form class="pure-form" action="/edit_playlist?list=<%= plid %>" method="post">
     <div class="pure-g h-box">
         <div class="pure-u-2-3">
-            <h3><input class="pure-input-1" maxlength="150" name="title" type="text" value="<%= playlist.title %>"></h3>
+            <h3><input class="pure-input-1" maxlength="150" name="title" type="text" value="<%= title %>"></h3>
             <b>
-                <%= playlist.author %> |
+                <%= HTML.escape(playlist.author) %> |
                 <%= translate(locale, "`x` videos", "#{playlist.video_count}") %> |
                 <%= translate(locale, "Updated `x` ago", recode_date(playlist.updated, locale)) %> |
                 <i class="icon <%= {"ion-md-globe", "ion-ios-unlock", "ion-ios-lock"}[playlist.privacy.value] %>"></i>
@@ -55,11 +57,9 @@
 </div>
 
 <div class="pure-g">
-    <% videos.each_slice(4) do |slice| %>
-        <% slice.each do |item| %>
-            <%= rendered "components/item" %>
-        <% end %>
-    <% end %>
+<% videos.each do |item| %>
+    <%= rendered "components/item" %>
+<% end %>
 </div>
 
 <div class="pure-g h-box">
diff --git a/src/invidious/views/history.ecr b/src/invidious/views/history.ecr
index fe8c70b9..40584979 100644
--- a/src/invidious/views/history.ecr
+++ b/src/invidious/views/history.ecr
@@ -6,13 +6,13 @@
     <div class="pure-u-1-3">
         <h3><%= translate(locale, "`x` videos", %(<span id="count">#{user.watched.size}</span>)) %></h3>
     </div>
-    <div class="pure-u-1-3" style="text-align:center">
-        <h3>
+    <div class="pure-u-1-3">
+        <h3 style="text-align:center">
             <a href="/feed/subscriptions"><%= translate(locale, "`x` subscriptions", %(<span id="count">#{user.subscriptions.size}</span>)) %></a>
         </h3>
     </div>
-    <div class="pure-u-1-3" style="text-align:right">
-        <h3>
+    <div class="pure-u-1-3">
+        <h3 style="text-align:right">
             <a href="/clear_watch_history"><%= translate(locale, "Clear watch history") %></a>
         </h3>
     </div>
@@ -28,31 +28,27 @@
 <script src="/js/watched_widget.js"></script>
 
 <div class="pure-g">
-    <% watched.each_slice(4) do |slice| %>
-            <% slice.each do |item| %>
-                <div class="pure-u-1 pure-u-md-1-4">
-                    <div class="h-box">
-                        <a style="width:100%" href="/watch?v=<%= item %>">
-                            <% if !env.get("preferences").as(Preferences).thin_mode %>
-                                <div class="thumbnail">
-                                    <img class="thumbnail" src="/vi/<%= item %>/mqdefault.jpg"/>
-                                    <form data-onsubmit="return_false" action="/watch_ajax?action_mark_unwatched=1&id=<%= item %>&referer=<%= env.get("current_page") %>" method="post">
-                                        <input type="hidden" name="csrf_token" value="<%= URI.encode_www_form(env.get?("csrf_token").try &.as(String) || "") %>">
-                                        <p class="watched">
-                                            <a data-onclick="mark_unwatched" data-id="<%= item %>" href="javascript:void(0)">
-                                                <button type="submit" style="all:unset">
-                                                    <i class="icon ion-md-trash"></i>
-                                                </button>
-                                            </a>
-                                        </p>
-                                    </form>
-                                </div>
-                                <p></p>
-                            <% end %>
-                        </a>
-                    </div>
-                </div>
-            <% end %>
+    <% watched.each do |item| %>
+        <div class="pure-u-1 pure-u-md-1-4">
+            <div class="h-box">
+                <a style="width:100%" href="/watch?v=<%= item %>">
+                    <% if !env.get("preferences").as(Preferences).thin_mode %>
+                        <div class="thumbnail">
+                            <img class="thumbnail" src="/vi/<%= item %>/mqdefault.jpg"/>
+                            <form data-onsubmit="return_false" action="/watch_ajax?action_mark_unwatched=1&id=<%= item %>&referer=<%= env.get("current_page") %>" method="post">
+                                <input type="hidden" name="csrf_token" value="<%= URI.encode_www_form(env.get?("csrf_token").try &.as(String) || "") %>">
+                                <p class="watched">
+                                    <a data-onclick="mark_unwatched" data-id="<%= item %>" href="javascript:void(0)">
+                                        <button type="submit" style="all:unset"><i class="icon ion-md-trash"></i></button>
+                                    </a>
+                                </p>
+                            </form>
+                        </div>
+                        <p></p>
+                    <% end %>
+                </a>
+            </div>
+        </div>
     <% end %>
 </div>
 
diff --git a/src/invidious/views/login.ecr b/src/invidious/views/login.ecr
index b6e8117b..1f6618e8 100644
--- a/src/invidious/views/login.ecr
+++ b/src/invidious/views/login.ecr
@@ -26,7 +26,7 @@
                 <form class="pure-form pure-form-stacked" action="/login?referer=<%= URI.encode_www_form(referer) %>&type=google" method="post">
                     <fieldset>
                         <% if email %>
-                            <input name="email" type="hidden" value="<%= email %>">
+                            <input name="email" type="hidden" value="<%= HTML.escape(email) %>">
                         <% else %>
                             <label for="email"><%= translate(locale, "E-mail") %> :</label>
                             <input required class="pure-input-1" name="email" type="email" placeholder="<%= translate(locale, "E-mail") %>">
@@ -62,7 +62,7 @@
                 <form class="pure-form pure-form-stacked" action="/login?referer=<%= URI.encode_www_form(referer) %>&type=invidious" method="post">
                     <fieldset>
                         <% if email %>
-                            <input name="email" type="hidden" value="<%= email %>">
+                            <input name="email" type="hidden" value="<%= HTML.escape(email) %>">
                         <% else %>
                             <label for="email"><%= translate(locale, "User ID") %> :</label>
                             <input required class="pure-input-1" name="email" type="text" placeholder="<%= translate(locale, "User ID") %>">
diff --git a/src/invidious/views/mix.ecr b/src/invidious/views/mix.ecr
index e9c0dcbc..e55b00f8 100644
--- a/src/invidious/views/mix.ecr
+++ b/src/invidious/views/mix.ecr
@@ -1,22 +1,20 @@
 <% content_for "header" do %>
-<title><%= mix.title %> - Invidious</title>
+<title><%= HTML.escape(mix.title) %> - Invidious</title>
 <% end %>
 
 <div class="pure-g h-box">
     <div class="pure-u-2-3">
-        <h3><%= mix.title %></h3>
+        <h3><%= HTML.escape(mix.title) %></h3>
     </div>
-    <div class="pure-u-1-3" style="text-align:right">
-        <h3>
+    <div class="pure-u-1-3">
+        <h3 style="text-align:right">
             <a href="/feed/playlist/<%= mix.id %>"><i class="icon ion-logo-rss"></i></a>
         </h3>
     </div>
 </div>
 
 <div class="pure-g">
-    <% mix.videos.each_slice(4) do |slice| %>
-        <% slice.each do |item| %>
-            <%= rendered "components/item" %>
-        <% end %>
-    <% end %>
+<% mix.videos.each do |item| %>
+    <%= rendered "components/item" %>
+<% end %>
 </div>
diff --git a/src/invidious/views/playlist.ecr b/src/invidious/views/playlist.ecr
index 377da20f..b1fee211 100644
--- a/src/invidious/views/playlist.ecr
+++ b/src/invidious/views/playlist.ecr
@@ -1,17 +1,20 @@
+<% title = HTML.escape(playlist.title) %>
+<% author = HTML.escape(playlist.author) %>
+
 <% content_for "header" do %>
-<title><%= playlist.title %> - Invidious</title>
+<title><%= title %> - Invidious</title>
 <link rel="alternate" type="application/rss+xml" title="RSS" href="/feed/playlist/<%= plid %>" />
 <% end %>
 
 <div class="pure-g h-box">
     <div class="pure-u-2-3">
-        <h3><%= playlist.title %></h3>
+        <h3><%= title %></h3>
         <% if playlist.is_a? InvidiousPlaylist %>
             <b>
                 <% if playlist.author == user.try &.email %>
-                <a href="/view_all_playlists"><%= playlist.author %></a> |
+                <a href="/view_all_playlists"><%= author %></a> |
                 <% else %>
-                <%= playlist.author %> |
+                <%= author %> |
                 <% end %>
                 <%= translate(locale, "`x` videos", "#{playlist.video_count}") %> |
                 <%= translate(locale, "Updated `x` ago", recode_date(playlist.updated, locale)) %> |
@@ -26,11 +29,12 @@
             </b>
         <% else %>
             <b>
-                <a href="/channel/<%= playlist.ucid %>"><%= playlist.author %></a> |
+                <a href="/channel/<%= playlist.ucid %>"><%= author %></a> |
                 <%= translate(locale, "`x` videos", "#{playlist.video_count}") %> |
                 <%= translate(locale, "Updated `x` ago", recode_date(playlist.updated, locale)) %>
             </b>
         <% end %>
+
         <% if !playlist.is_a? InvidiousPlaylist %>
             <div class="pure-u-2-3">
                     <a href="https://www.youtube.com/playlist?list=<%= playlist.id %>">
@@ -40,7 +44,6 @@
                     <a href="/redirect?referer=<%= env.get?("current_page") %>">
                       <%= translate(locale, "Switch Invidious Instance") %>
                     </a>
-
             </div>
         <% end %>
     </div>
@@ -93,11 +96,9 @@
 <% end %>
 
 <div class="pure-g">
-    <% videos.each_slice(4) do |slice| %>
-        <% slice.each do |item| %>
-            <%= rendered "components/item" %>
-        <% end %>
-    <% end %>
+<% videos.each do |item| %>
+    <%= rendered "components/item" %>
+<% end %>
 </div>
 
 <div class="pure-g h-box">
diff --git a/src/invidious/views/playlists.ecr b/src/invidious/views/playlists.ecr
index 3f892650..d9a17a9b 100644
--- a/src/invidious/views/playlists.ecr
+++ b/src/invidious/views/playlists.ecr
@@ -1,5 +1,8 @@
+<% ucid = channel.ucid %>
+<% author = HTML.escape(channel.author) %>
+
 <% content_for "header" do %>
-<title><%= channel.author %> - Invidious</title>
+<title><%= author %> - Invidious</title>
 <% end %>
 
 <% if channel.banner %>
@@ -16,12 +19,12 @@
     <div class="pure-u-2-3">
         <div class="channel-profile">
             <img src="/ggpht<%= URI.parse(channel.author_thumbnail).request_target %>">
-            <span><%= channel.author %></span>
+            <span><%= author %></span>
         </div>
     </div>
     <div class="pure-u-1-3" style="text-align:right">
         <h3 style="text-align:right">
-            <a href="/feed/channel/<%= channel.ucid %>"><i class="icon ion-logo-rss"></i></a>
+            <a href="/feed/channel/<%= ucid %>"><i class="icon ion-logo-rss"></i></a>
         </h3>
     </div>
 </div>
@@ -33,8 +36,6 @@
 </div>
 
 <div class="h-box">
-    <% ucid = channel.ucid %>
-    <% author = channel.author %>
     <% sub_count_text = number_to_short_text(channel.sub_count) %>
     <%= rendered "components/subscribe_widget" %>
 </div>
@@ -42,7 +43,7 @@
 <div class="pure-g h-box">
     <div class="pure-g pure-u-1-3">
         <div class="pure-u-1 pure-md-1-3">
-            <a href="https://www.youtube.com/channel/<%= channel.ucid %>/playlists"><%= translate(locale, "View channel on YouTube") %></a>
+            <a href="https://www.youtube.com/channel/<%= ucid %>/playlists"><%= translate(locale, "View channel on YouTube") %></a>
         </div>
 
         <div class="pure-u-1 pure-md-1-3">
@@ -50,7 +51,7 @@
         </div>
 
         <div class="pure-u-1 pure-md-1-3">
-            <a href="/channel/<%= channel.ucid %>"><%= translate(locale, "Videos") %></a>
+            <a href="/channel/<%= ucid %>"><%= translate(locale, "Videos") %></a>
         </div>
         <div class="pure-u-1 pure-md-1-3">
             <% if !channel.auto_generated %>
@@ -59,7 +60,7 @@
         </div>
         <div class="pure-u-1 pure-md-1-3">
             <% if channel.tabs.includes? "community" %>
-                <a href="/channel/<%= channel.ucid %>/community"><%= translate(locale, "Community") %></a>
+                <a href="/channel/<%= ucid %>/community"><%= translate(locale, "Community") %></a>
             <% end %>
         </div>
     </div>
@@ -71,7 +72,7 @@
                     <% if sort_by == sort %>
                         <b><%= translate(locale, sort) %></b>
                     <% else %>
-                        <a href="/channel/<%= channel.ucid %>/playlists?sort_by=<%= sort %>">
+                        <a href="/channel/<%= ucid %>/playlists?sort_by=<%= sort %>">
                             <%= translate(locale, sort) %>
                         </a>
                     <% end %>
@@ -86,18 +87,16 @@
 </div>
 
 <div class="pure-g">
-    <% items.each_slice(4) do |slice| %>
-        <% slice.each do |item| %>
-            <%= rendered "components/item" %>
-        <% end %>
-    <% end %>
+<% items.each do |item| %>
+    <%= rendered "components/item" %>
+<% end %>
 </div>
 
 <div class="pure-g h-box">
     <div class="pure-u-1 pure-u-md-4-5"></div>
     <div class="pure-u-1 pure-u-lg-1-5" style="text-align:right">
         <% if continuation %>
-            <a href="/channel/<%= channel.ucid %>/playlists?continuation=<%= continuation %><% if sort_by != "last" %>&sort_by=<%= HTML.escape(sort_by) %><% end %>">
+            <a href="/channel/<%= ucid %>/playlists?continuation=<%= continuation %><% if sort_by != "last" %>&sort_by=<%= HTML.escape(sort_by) %><% end %>">
                 <%= translate(locale, "Next page") %>
             </a>
         <% end %>
diff --git a/src/invidious/views/popular.ecr b/src/invidious/views/popular.ecr
index 62abb12a..e77f35b9 100644
--- a/src/invidious/views/popular.ecr
+++ b/src/invidious/views/popular.ecr
@@ -12,9 +12,7 @@
 <%= rendered "components/feed_menu" %>
 
 <div class="pure-g">
-    <% popular_videos.each_slice(4) do |slice| %>
-            <% slice.each do |item| %>
-                <%= rendered "components/item" %>
-            <% end %>
-    <% end %>
+<% popular_videos.each do |item| %>
+    <%= rendered "components/item" %>
+<% end %>
 </div>
diff --git a/src/invidious/views/search.ecr b/src/invidious/views/search.ecr
index 15389dce..fd176e41 100644
--- a/src/invidious/views/search.ecr
+++ b/src/invidious/views/search.ecr
@@ -2,6 +2,8 @@
 <title><%= search_query.not_nil!.size > 30 ? HTML.escape(query.not_nil![0,30].rstrip(".") + "...") : HTML.escape(query.not_nil!) %> - Invidious</title>
 <% end %>
 
+<% search_query_encoded = env.get?("search").try { |x| URI.encode(x.as(String), space_to_plus: true) } %>
+
 <!-- Search redirection and filtering UI -->
 <% if count == 0 %>
     <h3 style="text-align: center">
@@ -105,7 +107,7 @@
 <div class="pure-g h-box v-box">
     <div class="pure-u-1 pure-u-lg-1-5">
         <% if page > 1 %>
-            <a href="/search?q=<%= HTML.escape(query.not_nil!) %>&page=<%= page - 1 %>">
+            <a href="/search?q=<%= search_query_encoded %>&page=<%= page - 1 %>">
                 <%= translate(locale, "Previous page") %>
             </a>
         <% end %>
@@ -113,7 +115,7 @@
     <div class="pure-u-1 pure-u-lg-3-5"></div>
     <div class="pure-u-1 pure-u-lg-1-5" style="text-align:right">
         <% if count >= 20 %>
-            <a href="/search?q=<%= HTML.escape(query.not_nil!) %>&page=<%= page + 1 %>">
+            <a href="/search?q=<%= search_query_encoded %>&page=<%= page + 1 %>">
                 <%= translate(locale, "Next page") %>
             </a>
         <% end %>
@@ -121,17 +123,15 @@
 </div>
 
 <div class="pure-g">
-    <% videos.each_slice(4) do |slice| %>
-        <% slice.each do |item| %>
-            <%= rendered "components/item" %>
-        <% end %>
+    <% videos.each do |item| %>
+        <%= rendered "components/item" %>
     <% end %>
 </div>
 
 <div class="pure-g h-box">
     <div class="pure-u-1 pure-u-lg-1-5">
         <% if page > 1 %>
-            <a href="/search?q=<%= HTML.escape(query.not_nil!) %>&page=<%= page - 1 %>">
+            <a href="/search?q=<%= search_query_encoded %>&page=<%= page - 1 %>">
                 <%= translate(locale, "Previous page") %>
             </a>
         <% end %>
@@ -139,7 +139,7 @@
     <div class="pure-u-1 pure-u-lg-3-5"></div>
     <div class="pure-u-1 pure-u-lg-1-5" style="text-align:right">
         <% if count >= 20 %>
-            <a href="/search?q=<%= HTML.escape(query.not_nil!) %>&page=<%= page + 1 %>">
+            <a href="/search?q=<%= search_query_encoded %>&page=<%= page + 1 %>">
                 <%= translate(locale, "Next page") %>
             </a>
         <% end %>
diff --git a/src/invidious/views/subscription_manager.ecr b/src/invidious/views/subscription_manager.ecr
index 6cddcd6c..acf015f5 100644
--- a/src/invidious/views/subscription_manager.ecr
+++ b/src/invidious/views/subscription_manager.ecr
@@ -10,15 +10,15 @@
             </a>
         </h3>
     </div>
-    <div class="pure-u-1-3" style="text-align:center">
-        <h3>
+    <div class="pure-u-1-3">
+        <h3 style="text-align:center">
             <a href="/feed/history">
                 <%= translate(locale, "Watch history") %>
             </a>
         </h3>
     </div>
-    <div class="pure-u-1-3" style="text-align:right">
-        <h3>
+    <div class="pure-u-1-3">
+        <h3 style="text-align:right">
             <a href="/data_control?referer=<%= URI.encode_www_form(referer) %>">
                 <%= translate(locale, "Import/export") %>
             </a>
@@ -31,7 +31,7 @@
         <div class="pure-g<% if channel.deleted %> deleted <% end %>">
             <div class="pure-u-2-5">
                 <h3 style="padding-left:0.5em">
-                    <a href="/channel/<%= channel.id %>"><%= channel.author %></a>
+                    <a href="/channel/<%= channel.id %>"><%= HTML.escape(channel.author) %></a>
                 </h3>
             </div>
             <div class="pure-u-2-5"></div>
diff --git a/src/invidious/views/subscriptions.ecr b/src/invidious/views/subscriptions.ecr
index af1d4fbc..97184e2b 100644
--- a/src/invidious/views/subscriptions.ecr
+++ b/src/invidious/views/subscriptions.ecr
@@ -11,13 +11,13 @@
             <a href="/subscription_manager"><%= translate(locale, "Manage subscriptions") %></a>
         </h3>
     </div>
-    <div class="pure-u-1-3" style="text-align:center">
-        <h3>
+    <div class="pure-u-1-3">
+        <h3 style="text-align:center">
             <a href="/feed/history"><%= translate(locale, "Watch history") %></a>
         </h3>
     </div>
-    <div class="pure-u-1-3" style="text-align:right">
-        <h3>
+    <div class="pure-u-1-3">
+        <h3 style="text-align:right">
             <a href="/feed/private?token=<%= token %>"><i class="icon ion-logo-rss"></i></a>
         </h3>
     </div>
@@ -34,11 +34,9 @@
 <% end %>
 
 <div class="pure-g">
-    <% notifications.each_slice(4) do |slice| %>
-            <% slice.each do |item| %>
-                <%= rendered "components/item" %>
-            <% end %>
-    <% end %>
+<% notifications.each do |item| %>
+    <%= rendered "components/item" %>
+<% end %>
 </div>
 
 <div class="h-box">
@@ -55,11 +53,9 @@
 <script src="/js/watched_widget.js"></script>
 
 <div class="pure-g">
-    <% videos.each_slice(4) do |slice| %>
-            <% slice.each do |item| %>
-                <%= rendered "components/item" %>
-            <% end %>
-    <% end %>
+<% videos.each do |item| %>
+    <%= rendered "components/item" %>
+<% end %>
 </div>
 
 <div class="pure-g h-box">
diff --git a/src/invidious/views/trending.ecr b/src/invidious/views/trending.ecr
index 3ec62555..a35c4ee3 100644
--- a/src/invidious/views/trending.ecr
+++ b/src/invidious/views/trending.ecr
@@ -41,9 +41,7 @@
 </div>
 
 <div class="pure-g">
-    <% trending.each_slice(4) do |slice| %>
-            <% slice.each do |item| %>
-                <%= rendered "components/item" %>
-            <% end %>
-    <% end %>
+<% trending.each do |item| %>
+    <%= rendered "components/item" %>
+<% end %>
 </div>
diff --git a/src/invidious/views/view_all_playlists.ecr b/src/invidious/views/view_all_playlists.ecr
index 5ec6aa31..868cfeda 100644
--- a/src/invidious/views/view_all_playlists.ecr
+++ b/src/invidious/views/view_all_playlists.ecr
@@ -16,11 +16,9 @@
 </div>
 
 <div class="pure-g">
-    <% items_created.each_slice(4) do |slice| %>
-        <% slice.each do |item| %>
-            <%= rendered "components/item" %>
-        <% end %>
-    <% end %>
+<% items_created.each do |item| %>
+    <%= rendered "components/item" %>
+<% end %>
 </div>
 
 <div class="pure-g h-box">
@@ -30,9 +28,7 @@
 </div>
 
 <div class="pure-g">
-    <% items_saved.each_slice(4) do |slice| %>
-        <% slice.each do |item| %>
-            <%= rendered "components/item" %>
-        <% end %>
-    <% end %>
+<% items_saved.each do |item| %>
+    <%= rendered "components/item" %>
+<% end %>
 </div>
diff --git a/src/invidious/views/watch.ecr b/src/invidious/views/watch.ecr
index c553dc0e..aeb0f476 100644
--- a/src/invidious/views/watch.ecr
+++ b/src/invidious/views/watch.ecr
@@ -1,10 +1,15 @@
+<% ucid = video.ucid %>
+<% title = HTML.escape(video.title) %>
+<% author = HTML.escape(video.author) %>
+
+
 <% content_for "header" do %>
 <meta name="thumbnail" content="<%= thumbnail %>">
 <meta name="description" content="<%= HTML.escape(video.short_description) %>">
 <meta name="keywords" content="<%= video.keywords.join(",") %>">
 <meta property="og:site_name" content="Invidious">
 <meta property="og:url" content="<%= HOST_URL %>/watch?v=<%= video.id %>">
-<meta property="og:title" content="<%= HTML.escape(video.title) %>">
+<meta property="og:title" content="<%= title %>">
 <meta property="og:image" content="/vi/<%= video.id %>/maxres.jpg">
 <meta property="og:description" content="<%= video.short_description %>">
 <meta property="og:type" content="video.other">
@@ -16,7 +21,7 @@
 <meta name="twitter:card" content="player">
 <meta name="twitter:site" content="@omarroth1">
 <meta name="twitter:url" content="<%= HOST_URL %>/watch?v=<%= video.id %>">
-<meta name="twitter:title" content="<%= HTML.escape(video.title) %>">
+<meta name="twitter:title" content="<%= title %>">
 <meta name="twitter:description" content="<%= video.short_description %>">
 <meta name="twitter:image" content="<%= HOST_URL %>/vi/<%= video.id %>/maxres.jpg">
 <meta name="twitter:player" content="<%= HOST_URL %>/embed/<%= video.id %>">
@@ -24,7 +29,7 @@
 <meta name="twitter:player:height" content="720">
 <link rel="alternate" href="https://www.youtube.com/watch?v=<%= video.id %>">
 <%= rendered "components/player_sources" %>
-<title><%= HTML.escape(video.title) %> - Invidious</title>
+<title><%= title %> - Invidious</title>
 
 <!-- Description expansion also updates the 'Show more' button to 'Show less' so
 we're going to need to do it here in order to allow for translations.
@@ -69,7 +74,7 @@ we're going to need to do it here in order to allow for translations.
 
 <div class="h-box">
     <h1>
-        <%= HTML.escape(video.title) %>
+        <%= title %>
         <% if params.listen %>
             <a title="<%=translate(locale, "Video mode")%>" href="/watch?<%= env.params.query %>&listen=0">
                 <i class="icon ion-ios-videocam"></i>
@@ -134,8 +139,8 @@ we're going to need to do it here in order to allow for translations.
                         <div class="pure-control-group">
                             <label for="playlist_id"><%= translate(locale, "Add to playlist: ") %></label>
                             <select style="width:100%" name="playlist_id" id="playlist_id">
-                                <% playlists.each do |plid, title| %>
-                                    <option data-plid="<%= plid %>" value="<%= plid %>"><%= title %></option>
+                                <% playlists.each do |plid, playlist_title| %>
+                                    <option data-plid="<%= plid %>" value="<%= plid %>"><%= HTML.escape(playlist_title) %></option>
                                 <% end %>
                             </select>
                         </div>
@@ -227,12 +232,10 @@ we're going to need to do it here in order to allow for translations.
                     <% if !video.author_thumbnail.empty? %>
                         <img src="/ggpht<%= URI.parse(video.author_thumbnail).request_target %>">
                     <% end %>
-                    <span id="channel-name"><%= video.author %></span>
+                    <span id="channel-name"><%= author %></span>
                 </div>
             </a>
 
-            <% ucid = video.ucid %>
-            <% author = video.author %>
             <% sub_count_text = video.sub_count_text %>
             <%= rendered "components/subscribe_widget" %>