@geekyChick's solution worked for me I forgot to remove the complete key/value pair and only removed the "main" value, should be more vigilant I guess.
Psrik
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Last seen
User for
Post
Replies
Boosts
Views
Activity
Afaik Netflix, hotspot and prime video are supporting picture-in-picture mode, idk if they use the native player, I recommend you to check that, I guess that'll help you and YT doesn't support it now, also appleTV+ uses the native player I guess, and I did check with some websites online as any online video plays in the native player works in picture-in-picture mode. So from my testing I can say that using the native player is the only way to support picture-in-picture mode. Do correct me If I'm wrong.