My(M32) wife’s(F27) ex-boyfriend sent me a video of him having sex with my wife , after he found out we’re having a baby. How can I even deal with this?

My wife and I have been married for 4 years and we’re expecting our first child. Everything has been pretty normal and alright in our relationship. I do know her ex-boyfriend since they’ve been together for such a long time before we met. But didn’t hear anything about him after we got married. I always found our marriage pretty healthy and perfect afterall. Nothing ever made me feel doubtful or insecure, until now. Last week we had a little party with our close friends and family to announce my wife’s pregnancy. Everything was alright and planned but somehow someone , maybe some mutual friends told my wife’s ex boyfriend about her pregnancy. So around 2 days after our party , he texted me. At first I thought It’s just a simple drunk text and stuff but shit was worse than I thought. There was a video. I tried so hot not to watch it cause I knew that would be nothing good to watch anyways. But then I finally did. And I wish I never did. It was a video of my wife having sex with him. The concept of seeing my wife having sex with someone else even thought It was for many years ago was already fucked up enough. But I hate the way that it was also so… passionate. Romantic. I don’t know how to explain it but you could literally feel the connection between them. And I hated that. It was like my whole life got destroyed in one second. My head got filled with messed up things. Messed up scenarios. Messed up doubts. Now I can’t take it out of my head. My wife’s noticed something’s up but I haven’t told her about it yet. I don’t know if I ever will. In my whole life I’ve never felt worse. I heard my wife telling another guy that she wants to have his kids. While she’s carrying my kid… Man I hate this situation but I’m really confused. Don’t know how to deal with it. Don’t know how to take these stuff out of my head. Should I tell her? Should I just go beat the shit out of him instead? Should I just get over it? Any advice would be appreciated.