Looking over my @YouTube playlists from 2010, 2011 (mostly music videos). So many videos are shown as "DELETED" and no longer available. Wish their metadata was still available so I can remember what they were.
Thanks for reaching out. This generally happens when a video is deleted by the creator or by YouTube. While the isn't a way what videos where deleted, you can submit your thoughts using our feedback tool: https://goo.gl/VjzRwm . This will help us prioritize the request.