I have taken the odd video on the iPhone and photo while airborne, and it is a rare event. I always get the RH seat to do it. Can't see what the problem is.
However I was at Breighton for a fly in maybe one or two years ago and parked up next to a 172 that had no less than four Go Pros set up in the cockpit. I mean, four Go Pros, what's that all about? I know we pilots are supposed to be egomaniacs but sheesh.
'This is one of me from the rear flying the aircraft. This is one of me from the side flying the aircraft. This is one of me from the front flying the aircraft.'
Get a life.