Before several months ago, I could swap to a different app while watching a non-music Youtube video, and it would keep a mini player on screen. I can still do this on my stock android phone, but on GrapheneOS, Pixel 7, it no longer works except seemingly at random for the occasional videos.
Example of a video that it works for: https://youtube.com/watch?v=qPix_X-9t7E
Example of one it doesn't work for: https://youtube.com/watch?v=GJBnwZQ60Ss
When I reset my phone about a month ago, it seemed to temporarily work for all videos again, but then went back to almost none.
Do any of the other Youtube frontend apps have PIP?