Comment by velcrovan

I use it on Firefox and Safari on Mac OS (mainly Safari), and it's been OK except it's started doing a thing where it blips a bit after roughly the first 1sec of video plays.

I wonder if being a YouTube Premium subscriber is also a factor here. I do pay for it so I don't see ads. But maybe the way ads are being served/injected has changed things for the worse for people that get them.