Error type: "Forbidden". Error message: "The referrer https://www.googleapis.com/youtube/v3/search?part=snippet&channelId=&maxResults=2&order=date&type=video&key=AIzaSyD2o49KjXrArY79xb7ApaZxgGQv7cza4TU does not match the referrer restrictions configured on your API key. Please use the API Console to update your key restrictions." Domain: "usageLimits". Reason: "ipRefererBlocked".
Did you added your own Google API key? Look at the help.