posting a compromising picture /video of you

I think, that you should ask some help from police. Nobody have rights to post your pictures on internet without your permision. First - try to threat him with police and if it dont help, then realize your threats. In my country police is very helpful with things like this. I hope, that everything will be good :)

There is a new law now that anyone who releases sensitive graphic materials like that can be prosecuted so you can go to a police and tell them someone has plans on exposing them. Well after that if you are beautiful then the police would ask for that picture or video for them selves.

I wouldn't want someone to have the power to hold something over my head. I would walk away and never look back,. A person like this is going to do what they want no matter what you say anyway.