Playlists: Fix pagination of Invidious playlists (#3861)

src/invidious/routes/playlists.cr

@@ -421,8 +421,13 @@ module Invidious::Routes::Playlists
       return error_template(500, ex)
     end
 
-    page_count = (playlist.video_count / 200).to_i
-    page_count += 1 if (playlist.video_count % 200) > 0
+    if playlist.is_a? InvidiousPlaylist
+      page_count = (playlist.video_count / 100).to_i
+      page_count += 1 if (playlist.video_count % 100) > 0
+    else
+      page_count = (playlist.video_count / 200).to_i
+      page_count += 1 if (playlist.video_count % 200) > 0
+    end
 
     if page > page_count
       return env.redirect "/playlist?list=#{plid}&page=#{page_count}"
@@ -433,7 +438,11 @@ module Invidious::Routes::Playlists
     end
 
     begin
-      items = get_playlist_videos(playlist, offset: (page - 1) * 200)
+      if playlist.is_a? InvidiousPlaylist
+        items = get_playlist_videos(playlist, offset: (page - 1) * 100)
+      else
+        items = get_playlist_videos(playlist, offset: (page - 1) * 200)
+      end
     rescue ex
       return error_template(500, "Error encountered while retrieving playlist videos.<br>#{ex.message}")
     end