The reddit sub r/raisedbynarcissists may help you, OP.
What you’re describing was exactly how my mother treated me at your age, sadly.
I’m in my 40s now and the only effective strategy I’ve found is to physically remove myself or suspend contact when her behaviour gets bad. I don’t even bother to explain or argue any more.
Those videos are a result of people min/maxing for the algorithm; the fact that you see them so much shows that they are unfortunately succesfull. Its a symptom of people being able to make (good) money from it.
There is still plenty of good content, but you would find it in the recommendations. You have to go searching for it. Search for your hobbies and interests. The more niche your search terms the better.
Haha I feel the same, hopefully the useful communities will end up here