Ask HN: Whats happening with YouTube, lots of famous videos going down ?

Over the last 3-4 weeks quite a few videos which me and my wife visit regularly have become "unavailable" now.

And today this one

Uptown Funk:

https://www.youtube.com/watch?v=OPf0YbXqDm0

Alice in chains:

https://www.youtube.com/watch?v=TAqZb52sgp

There seems to be no relation of genre or artist as such.

Am I just noticing unrelated things or anyone notice this ?

Location: India