Stopped working for me last weekend if i’m logged in. Youtube deploy this kind of things in waves usually.

Comments can be useful to know if what you are watchin contains the information you’re looking for

As usual they’re deploying it in waves. I can confirm i get no description, no comments and when watching a playlist it will play the first few seconds then it will display “content unavailable” and switch to the next video. If I disable ublock origin or if I logout everything goes back to normal.