Will he share?

So i was with a guy as FWB for 7 months. Over that time he got a video of me giving him head. I ended thing today because I found a guy I wanna date and, well, it ended really bad. He called me a cheater, said I knew he loved was just scared yadda yadda yadda. But now I'm scared he will leak the video. I mean, I don't think he would do that but what should I do if it happens?