Fix playlist_thumbnail extractor

assets/css/default.css

@@ -1,6 +1,8 @@
 html,
 body {
-  font-family: BlinkMacSystemFont,-apple-system,"Segoe UI",Roboto,Oxygen,Ubuntu,Cantarell,"Fira Sans","Droid Sans","Helvetica Neue",Helvetica,Arial,sans-serif;
+  font-family: BlinkMacSystemFont, -apple-system, "Segoe UI", Roboto, Oxygen,
+    Ubuntu, Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", Helvetica,
+    Arial, sans-serif;
 }
 
 .deleted {
@@ -108,6 +110,7 @@ img.thumbnail {
   height: 100%;
   left: 0;
   top: 0;
+  object-fit: cover;
 }
 
 .length {
@@ -452,6 +455,6 @@ video.video-js {
   */
   top: 50%;
   left: 50%;
-  margin-top: -.81666em;
+  margin-top: -0.81666em;
   margin-left: -1.5em;
 }

src/invidious.cr

@@ -3003,7 +3003,7 @@ get "/user/:user/about" do |env|
   env.redirect "/channel/#{user}"
 end
 
-get "/channel:ucid/about" do |env|
+get "/channel/:ucid/about" do |env|
   ucid = env.params.url["ucid"]
   env.redirect "/channel/#{ucid}"
 end
@@ -3107,8 +3107,7 @@ get "/channel/:ucid/playlists" do |env|
   end
 
   items, continuation = fetch_channel_playlists(channel.ucid, channel.author, channel.auto_generated, continuation, sort_by)
-  items.select! { |item| item.is_a?(SearchPlaylist) && !item.videos.empty? }
-  items = items.map { |item| item.as(SearchPlaylist) }
+  items = items.select { |item| item.is_a?(SearchPlaylist) }.map { |item| item.as(SearchPlaylist) }
   items.each { |item| item.author = "" }
 
   env.set "search", "channel:#{channel.ucid} "

src/invidious/helpers/helpers.cr

@@ -397,8 +397,8 @@ def extract_items(nodeset, ucid = nil, author_name = nil)
         )
       end
 
-      playlist_thumbnail = node.xpath_node(%q(.//div/span/img)).try &.["data-thumb"]?
-      playlist_thumbnail ||= node.xpath_node(%q(.//div/span/img)).try &.["src"]
+      playlist_thumbnail = node.xpath_node(%q(.//span/img)).try &.["data-thumb"]?
+      playlist_thumbnail ||= node.xpath_node(%q(.//span/img)).try &.["src"]
 
       items << SearchPlaylist.new(
         title,