Safari + Vinegar is my favorite way to watch youtube on any platform. One minor bug I sometimes notice is that the PiP option stops working between videos until you actually hit refresh.
Agreed about Orion, I keep it around and update it and try it out every now and again but I don’t think the experience is there yet.
It's too bad, the stock Safari in iOS 9 did both those things. Nowadays the rare times I want to watch YT on Safari, I just refresh the page once or maybe twice, which somehow makes it not show an ad.
I just use Vinegar [0] and watch YT on Safari. It also allows me to listen to the videos with the phone locked.
[0] https://apps.apple.com/us/app/vinegar-tube-cleaner/id1591303...