FYI, several alternative youtube frontend apps are available for "Chromecast with Google TV" (which is just an Android TV device), for instance the opensource Newpipe. (Though this is piracy, and you shouldn't do piracy, because piracy hurts Google and content creators - who will gladly take donations -)
For Android TV, there's even the even nicer https://github.com/yuliskov/SmartTubeNext which integrates SponsorBlock.