I actually looked into this a bit after posting that comment, since it occurred to me that I don't actually know exactly what's blocking YouTube ads for me. (I'

I actually looked into this a bit after posting that comment, since it occurred to me that I don't actually know exactly what's blocking YouTube ads for me. (I'm still not sure, which is why I didn't edit my previous comment after doing that research.) Empirically, I don't get YouTube ads in the iOS app. I do use Firefox Focus as a content blocker, in addition to AdGuard DNS. I don't use the AdGuard app, and it was my understanding that Firefox Focus only blocked ads in Safari, so I assumed it was AdGuard DNS. The documentation for AdGuard DNS seems to indicate that it shouldn't work for this, but it seems like either that documentation or the documentation for iOS content blockers is missing something. Unless YouTube has just decided not to serve me ads for some reason. (I'm not complaining either way.)