Videoge-sehen
Error type: "Forbidden". Error message: "Project 524108894751 has been scheduled for deletion and cannot be used for API calls. Visit https://console.developers.google.com/iam-admin/projects?pendingDeletion=true to undelete the project." Domain: "usageLimits". Reason: "accessNotConfigured".

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

Check in YouTube if the id PLl_WjBN1wwk4WxGzRG8GF_mXkth3-I7bn belongs to a playlist. Check the FAQ of the plugin or send error messages to support.
Error type: "Bad Request". Error message: "Bad Request" Domain: "usageLimits". Reason: "keyInvalid".

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

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