@len@nyan.network Mixed news: I use #Blokada, which does DNS filtering for the entire device (not just the browser) using the #Android VPN mechanism. Normally, if I use YouTube at all, I do it either in Firefox with uBlock Origin or in NewPipe. Disappointingly, if I experimentally open the YouTube app, I still see an advert. Google must be working around DNS-level ad-blockers by, for example, downloading content and adverts from the same domain. On the bright side, if I tap on an advert, the YouTube app tries to use #Firefox to open it, and #uBlockOrigin blocks that access. So it's not a complete solution, but changing the default browser to Firefox and installing uBlock Origin may be enough to keep your relative safe. Good luck! I've been in a similar situation to yours and I know how hard it is to protect elderly relatives from an adversarial technology ecosystem.