Searched for posts mentioning this problem but did not find any. You guys aware? Thanks.
It does look broken. I’ll put it on my to-do list and reply to this thread with updates. Thanks for letting us know.
Here’s a test video:
https://www.youtube.com/watch?v=Cc-QzB6LCoc
Hey, I recognize that one 
Yeah, I thought that one might be familiar to most of you, but I didn’t want to use some random cat video to test my fix. 
It appears I have Youtube working now. Although the videos themselves should work without doing so, you may need to clear your browser cache to benefit from the CSS I added that makes the videos responsive (resize on different devices).