Hopefully, the "stop showing me this ad" feature gets fixed. I'm tired of always being presented with an ad for the "Dixie Store". No, I don't want to shop for Confederate flags and other garbage.
To get there, when you see a youtube add, there should be some text in the bottom right, "Ad 1 of 2" and then an information icon, click that. and scroll down the popup and you should see "ad settings"
If you don't have an account then I'd really recommend an ad blocker in this circumstance.
It can be done