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.
Well I feel that any cryptobro stuff was entirely optional and that Brave is dedicated to their users privacy.
https://brave.com/faq/#concerns
However I still feel Firefox is the right choice, it’s just not a one that I’ve been able to fully commit to yet.