Some providers are video camera friendly, I jus had a threesome last month in NYC with cameras involved.  From that experience I can say, it's interesting to try, but I discovered:

1.  I look horrible naked.  
2.  Operating a camera with your big head and operating the lady with your little head is very difficult, there is not always enough blood to run both heads at the same time.
3.  I look bad fucking . . . I don't fuck anything like a Porn star.
4.  Time flys when you are having fun, but running a camera and trying to have fun doubles the effect.  An hour felt like 20 min, and I probably only accomplished 15 min worth sex.
5.  Always check your media!  I brought my own camera for POV, but she had a camera on a tripod . . . Sweet!  Until I got back to the hotel loaded the chip and saw some really old dude's video!  I contacted the provider and she brought me my video, but the lesson is, be sure you have the right one with you before you leave.  I could have had a sex tape out there!
6.  I look better fucking than some really old dude!
7.  I look better naked than some really old dude!
8.  That little 2 inch square view finder is a pain in the ass use.  And isn't facing you half the time. So you have no idea what your shooting or how much is on screen.
9.  Being that close to your subject with out a wide angle lens is problematic, you can't get that much in the field of view.   She had large mirrors on every wall, so that helped, I could shoot the mirror to get the action from a better distance.
10.  Now I have evidence that I need to feed and care for.  I have to always make sure it can't be found, and hope it is not discovered, etc.  It's like the gun you used in a crime, always worrying about it.

Would I do it again . . . Maybe.  These chicks did some depraved shit, that may never happen again in my life, so now I have a permanent perfect memory of the events that transpired. But, I would recommend you use a Camera on a tripod that you don't have to fuck with, and then forget about it.  Spend more time dicking around with the girl than the camera.