VideosError type: "Not Found". Error message: "The playlist identified with the requests
playlistIdparameter 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 https://www.youtube.com/playlist?list=PLvXGBc870m-IXO5lrH8DzmPmcw0BCb8bf belongs to a playlist. Check the FAQ of the plugin or send error messages to support.