Tammy, just because your husband thinks that it doesn't mean every man thinks that
He also concurs that any decent human being deletes stuff like that when you break up with someone
When me and my partner split for a year I watched one of our short videos once or twice. As did he. We are decent humans.
Even if he is watching the video and having a wank to it - so what?! He's probably wanking to him being in the video and having the sexual act done to him rather than wanking over his ex wife
But regardless of why he has the videos or how often he looks at them, he is not in the wrong here. Is there some rule which says when you get into a new relationship you must delete and remove every single bit of evidence which indicates you had a sex life with someone other than your new partner?
feel sorry for his poor ex-wife, imagine her horror knowing he kept these too
Oh please. She probably knew at the time of sending the photos and taking part in the video that he'd never delete them. Come on, who takes part in that and seriously thinks the man will actually delete them? 
I'm sorry but he's utterly disgusting
No he's not. He's a man who enjoys watching a video of himself having sex.
Some guys just like to keep any gf they have on the back foot with stuff like this. The work hard to make their partners insecure in passive aggressive ways and this is one way of doing that
Are you serious?! So him keeping these videos = him doing so to make the OP insecure? What about when he was single, what was his reasons for keeping them then?
He also has a skewed view that he is still in control of his ex by keeping these type of videos.
One pp said fantastic memories...that's absolute bollocks
No, what you've just written is absolute bollocks. It is NOTHING to do with control. He keeps the videos so he can have a wank over him receiving a blowjob and having sex. I have videos of myself having sex with my partner - I don't watch them out of "control" I watch them because it's a turn on!
Fantastic memories are decent photos of family and friends not blow jobs!!!!
Speak for yourself. Watching a video of yourself receiving a blowjob is, to the majority of men, a fantastic memory to look at.