@burnout426 Wow. So they know but they have no clue how to solve it? sounds reassuring..
And isn't about just youtube..it happens in every site that offers notification in the browser

Why answering if you have no idea what's the matter?
If web push notifications isn't clear enough..no idea how to explain.
I was used to get notification from Opera from youtube or keepa, they are not working anymore by months now..
But never mind...if here you don't even know what they are... amen..

web push notification stopped to work long time ago.
Always get this error.

"Unable to register push subscription AbortError: Registration failed - push service error"

I don't know why they don't care...but at this point if you don't fix it just ditch the service instead of offering notification that won't work cause you do nothing about it