You mind if I fap to her vid again? :]
but seriously, if it's her then that sucks...but If it was before your relationship and you still love her, you'll just have to put this thing in the past... Let's show a raise of hand if you've ever recorded yourself having sex or foolin around with a random chick or girlfriend... everybody does it and she obviously isn't the one who uploaded it... On the other hand, if she did cheat on you, then forget about that bitch and move on.