Error type: "Not Found". Error message: "The playlist identified with the request's
parameter cannot be found." Domain: "youtube.playlistItem". Reason: "playlistNotFound". Location type: "parameter". Location: "playlistId".
Did you added your own Google API key? Look at the help
Check in YouTube if the id rFF2-Y2sOTRB_Y1MSba_qly6rK-N87eN
belongs to a playlist. Check the FAQ
of the plugin or send error messages to support