She's almost 70, spend all day watching q-anon style of videos (but in Spanish) and every day she's anguished about something new, last week was asking us to start digging a nuclear shelter because Russia was dropped a nuclear bomb over Ukraine. Before that she was begging us to install reinforced doors because the indigenous population were about to invade the cities and kill everyone with poisonous arrows. I have access to her YouTube account and I'm trying to unsubscribe and report the videos, but the reccomended videos keep feeding her more crazy shit.
Do the block and uninterested stuff but also clear her history and then search for videos you want her to watch. Cover all your bases. You can also try looking up debunking and deprogramming videos that are specifically aimed at fighting the misinformation and brainwashing.