I hate to say this but its very hard to get these videos taken down permanently, as in my experience, once it goes on the internet, and you get it removed, another person uploads it to that site or another, and there are loads.
I used to model and film content and it has been impossible to remove videos which I have copyright to, I have had them taken down, then a few days later, a whole new crop of them appear. This is why I no longer film anything and dont bother taking the clips down.