Living room camera (that he knows about) caught my roommate masturbating

Mostly because of my cat, and the times maintenance has to come inside when no one is home, I have a camera set up that mostly faces the living room and front door. My roommate obviously knows about it and said he was fine with it. I even told him I usually have it set to record movement while I'm at work.

Well, he usually works similar hours so the other day when I got a movement notification at work, I opened it and saw a clip of him on the couch just fully jerking off.

I'll admit that I found it hot but it's also weird. I mean it feels wrong but also like, he definitely knows about the camera. The question is, is it more likely that he forgot about it or could it have been something intentional? Like that he wanted me to see?

For more context, he's bi but knows I have a bf, and we've never done anything at all like that.