Go to the police. This man is a predator. He basically wants to force you to have sex, against your will, at his whims; or he will send that video to everyone you know. I doubt you're the only one he's doing this to. If you play along with it you make it worse. Tell your husband, hopefully he will understand and have your back. And seriously - GO TO THE POLICE. There is no other choice. Do you really want to live in a hell where you can't even decide who to have sex with and when, in fears of him releasing a video?