The plugin's good. I'm just leaving a review to mention that the plugin no longer is able to select videos in other users' playlists when on the playlist page itself. It works when the playlist is in the sidebar. I assume it's YT-side because I tested it in multiple browsers & profiles, and it only worked in one, where I bet this update hasn't hit. It's like the plugin can't "see" playlists that aren't your own when on the playlist page; the video counter reads 0 in the Multiselect UI.