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.
To begin with, I'd stop her using the YouTube website logged in.
Set her up with Inoreader - then when you find something interesting, you can visit the 'video' page and subscribe to the feed...
If you log her out, that will mean she just uses it without logging in - which works ok for feeds. She can browse, but it's fresh.
Just a few suggestions that work for me - via RSS feed (not subscribed in Youtube):
Juicy Life
Sci Show
Simonscat
FailArmy
Daily Dose
Vlad Vexler
Big Think
With inoreader it's a simple task to mark all items in a folder as read if you want to skip them. Also, with the inoreader account you can log in remotely at any browser, then you can find stuff you think is cool and subscribe - then that will show up in her feeds.
I love this site, I found a couple of dozen and added them in pyradio app so I've always got interesting listening when I don't want to stare at the screen.