Technically this is a variant on the doggystyle position, i think the right name is the jockey position or the rear entry position. I cant see if he fucks her anally or vaginal but my guess is vaginal, i never saw or heard a girl having an orgasm like this while banging her ass. This is also the proof that size really doesnt matter, he has a pretty small dick which can be seen at the end of the video but apparently does amazing things with it.