Yeah so I’ve seen those videos too. Most of them were caused by not paying attention to these areas.
The straight bar opposite of the handles needs to be hard mounted over a door jam OR using purpose built brackets mounted to the stud.
I installed brackets to the studs on the one I have in my home. It’s survived a few thousand pullups, many 7 year old gymnastics things, and maybe a sex swing on occasion - and hasn’t failed.
Just make sure the pads on the side are in contact with the wall on both sides.
If it doesn’t have either of those things, you’ll be the next victim.
This one looks fine though
That’s all in another thread