We used to record ourselves all the time, especially in the first year of our relationship. It was very amateur (handheld video, from my regular camera--not even a real video camera, and not on a tripod either)--but it was hot, hot, hot!!!
And it sustained both of us through 2 years of long-distance, most of all through 3 months of being completely physically apart when I was in Africa and Iceland. We keep meaning to do it again, but I think it will help to get a nicer video camera (with digital memory instead of a tape). We also used to take a lot of pictures of each other and ourselves, in various states of undress and penetration
but for some reason, we have less need/motivation to do that since we got married and began living together.