Vídeos Favela é isso aí

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 PLPQwb6WPsqKQ2p0Q60H6B_P8b8ExPSIhJ belongs to a playlist. Check the FAQ of the plugin or send error messages to support.