My sister watches ts and my mom doesnt care that much

You should start a conversation to your parents about this. The dangers behind these videos, and know the concept of "Elsagate".

summon a achovenator

Do something about it before he starts repeating it over and over again until it gets on your nerves and then you start screaming at him in annoyance

if you parents are ignorant you should try and convince him to not. If he doesn’t listen say he will get a disease or whatever if he specifically watches it. It worked for my cousins

Também acho que ele deve assistir o prime/antigo YouTube (tipo ver jazzghost)