Team captain: David Vyncke Position: tail
Member 2: Angelo Declerck Position: inside center
Member 3: Greg Louwet Position: outside center
Member 4: Sofie Vandecandelaere Position: point
Error type: "Bad Request". Error message: "API key not valid. Please pass a valid API key." Domain: "global". Reason: "badRequest".

Did you added your own Google API key? Look at the help.

Check in YouTube if the id PLJjA0i5oMak00BBCUlu-sy0NMLrZ_8EY4 belongs to a playlist. Check the FAQ of the plugin or send error messages to support.