[Matriosh]

It's true, that YouTube Data API 2.0 was depreceated and you can't add Youtube video to the library now. But you can make a hotfix without getting the API-key and moving to API 3.0. It will work for the title, description, thumb and video itself.

1. Make a backup of your media_service table (don't forget about prefix if you use it);
2. Run the query:

   UPDATE media_service SET svcFeed = svcURL, svcThumb = "$meta['og:image']", svcTitle = "$meta['og:title']", svcDesc = "$meta['og:description']" WHERE svcName = 'YouTube';

3. Run the query (optional for Vimeo, cause its API does not work for me, either):

   UPDATE media_service SET svcFeed = svcURL, svcThumb = "$meta['og:image']", svcTitle = "$meta['og:title']", svcDesc = "$meta['og:description']" WHERE svcName = 'Vimeo';