He didn't make a video without her knowing it... With todays phones, we're all recording each other saying and doing things. Hell, my GF (before we married) was taking dick-pics with her phone of my man-tool on our 2nd or 3rd night together (and quite intoxicated) - years later, she still has them LOCKED in her phone.
The girl is bouncing the OP's emotions. Loving one moment, cold as ice the next. When I was with women when it was about FWB or bootycall - we have our mutual fun. When I leave their home, I may not talk to them again for days or weeks etc... Its just sex, we got off. I have other things to do. A few times, a woman would "fall" for me, want to date, etc. And I'd tell them their feelings are mis-placed - usually no longer having sex with them as it hurts their feelings.
With my wife (or anyone who is really in love with another person) - they are always thinking about that person... that is what love is.
If you love someone one - you simply ARE... and your actions are then based on that. She admits she knows what she's doing, is messing with his head...