Error type: "Bad Request". Error message: "API key expired. Please renew the API key." Domain: "global". Reason: "badRequest".
Did you added your own Google API key? Look at the help
Check in YouTube if the id PLiBTsYzx8X_2JX-FUTFzrtIcHOMtNWUs-
belongs to a playlist. Check the FAQ
of the plugin or send error messages to support