I’ve seen on TrackerControl this system app (on my grapheneOS) contacting Amazon (amazon.com) and Google (android.clients.google.com, m.youtube.com, play.google.com and www.youtube.com).
What does this app do? I’ve disabled internet access for the time being.
Here is an alternative Piped link(s):
www.piped.video
Piped is a privacy-respecting open-source alternative frontend to YouTube.
I’m open-source; check me out at GitHub.