No Stupid Questions

What if you started disliking these extremist videos, and explicitly liking more tame videos with the kind of content she would enjoy? This might tell the algorithm to prefer less polarizing videos over time.

The caveat is, I've heard likes/dislikes "don't count" unless you've watched a certain percentage of the video, at least more than a few seconds. So you can't just sit there and speed through clicking dislike on everything.

Another thing you can try is clicking algorithm-suggested videos that seem less radical than the current one. For example, on the home screen, click on something innocuous that's trending. From "related videos," in any video, pick literally anything that's not what she's already watching.

You will probably have to do this for a while, but eventually she might "latch on" to whatever the algorithm starts suggesting. She almost certainly won't stop watching those radical videos entirely - people that age are set in their ways. But maybe you can get her to watch less.

I too faced this dilemma. So I uninstalled every ad blocker and made it very tedious videos. It kinda helped.

In addition to deleting history, could you get direct access to the account and watch better/different content to hopefully get that stuff more recommended too?

Find several wholesome channels that have a decent amount of content and look at the playlists. Make sure auto play is on and just plow through playlist after playlist ever night.

I did this by mistake once with kid videos. Iy wreaked my feed for so long 🤣

The only thing I can really suggest is to start culling some of the worst, and introduce some counter-influences like debunkers, in hopes of her feed organically at least introducing some of that to her over time.

I am not sure if she would watch, but there is at least the possibility. Even if you kill her account in some fashion, if she just rejoins and starts looking for the same stuff again...

Dislike and “do not suggest” as many of such videos as you find on recommendation. Block a few channels. Like some random non aggressive channels and non political channels and videos. See if any bad channels are subscribed and unsub+block them.

So this for few days and her algos will hopefully be clean.

You can't, it's like trying to fix your mom's phone. The only way is resetting it, try resetting your mom.

Create a new YouTube profile with the same name and picture and set it as the default watch profile. Then just preload it with subscriptions from a varied amount of content and a few stray likes here and there for content she might like in general. Don’t mention what happened and just remove the old profile after a while.