Out of the box it can play audio in the background, and now that extensions are available you can block ads as well. You don’t really need constantly updating 3rd party clients or questionable firewalls anymore if you just want usable youtube on a phone.
Last time I tried Newpipe it wasn’t all that great. Would be fine if you just hit up YouTube for random stuff, but didn’t have any consideration for channels you subscribed to. I’m guessing it’s gotten better?
I find it reliable. I just use subscriptions feed.