Userscript to Filter Playlists in the Save to Playlist PopUp window
When you want to add a video to a certain playlist, it is sometimes difficult to find the right playlist again.
That's why I add a filter input to the Save to Playlist popup at the top so you can filter the playlists by autocompletion.
Playlists are filtered by the string in the filter input field and additionally sorted by the playlist title
However, if the current video is already in a playlist, this playlist will be displayed above the complete list.