Mr.Blair YouTube

Error type: "Forbidden". Error message: "Requests from referer https://www.googleapis.com/youtube/v3/search?part=snippet&channelId=&maxResults=8&order=date&type=video&key=AIzaSyAMT16a157n3OU1-mmz6ehsZ6FFZ9koyEw are blocked." Domain: "global". Reason: "forbidden".

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

Check in YouTube if the id MrBlairChannel belongs to a username. Check the FAQ of the plugin or send error messages to support.