The only downside is that on the iPhone, if you minimize a YouTube video in Brave, playback stops. The official YouTube app lets you keep watching in a mini window while browsing or checking emails. Still, that’s a small price to pay for an ad-free experience.
I can now minimize YouTube videos playing on my iPhone via the Brave browser. I think it works when you maximize the video and then minimize it. So I can use other apps on the phone while the video is playing. I have seen zero ads since using it.