I don't know, I use uBlock Origin for Chrome (not sure if there are equivalents for other browsers) and I never see adds from my desktop, with a free account.
It does not scrap out sponsor babble but it definitely blocks youtube adds.
Pretty sure OP and others above are talking about from smart enabled media devices like Amazon firestick or google's equivalent chromecast, a hardware device you plugin to your tv, not the chromecast capability.
OK I must admit I'm very old in Internet time and I didn't get that they were not talking about a simple navigator on desktop. I do have a smart vaccum cleaner robot which is not a roomba, although I managed to connect it to my wifi and I can control it from an app on my smartphone. Just trying to keep up.