I have YouTube premium and an adblocker and I don’t have this problem. I’m skeptical that it’s related.

I too am a YouTube premium customer, and my video performance is horrible lately.

Funny enough, on my living room smart TV YouTube app my performance has been bad as well, even though I am logged in to my premium YouTube account.

Something is going on, and it does effect some (at least) premium customers.

Wasn’t that exactly how the adblock blocks went out in the first place? Only a few areas at a time were affected.

Same, YT Premium, Firefox, ad blocker, no issues with streaming.