If you add a video with a link in your newsfeed such as https://youtu.be/YbYWhdLO43Q then after the video shows/loads you delete the link this will cause the generated link to be blank. I'll try to run the steps bit by bit.
1.Visit your dashboard and paste a youtube link
2.After the preview loads before hitting "send" delete the link.
3.Hit send and the video will work (on the newsfeed) however it creates a blank white page on the video page.
4.This bug only happens if you delete the link before hitting send in your newsfeed.
The only reason I bring this up is you could image the issue this would cause if 50+ users didn't want the youtube link to show so they deleted it and then hit send you would have pages and pages of white blanks on your video page.