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, which somehow prevents an ad from appearing 90% of the time.