Why dont piercing studios allow you to record video?

Well some piercing studios do allow you to record videos but others might not as they want privacy while performing their work or the camera might distract them

The camera may distract them while they are doing their job. Also if pictures are making noises during the process they could mess up the piercing.

It is true but it depends on camera, computer, programs, all that stuff

That is true  i hope that : )