"I am thinking something like a CVR but video which is always on during the flight and capture the whole flight or the last 30 minutes of pilot action and the outside could be very helpful for accident investigation. No need to publish or even save it if nothing went wrong. "

Absolutely not - unless completely voluntary in your private aircraft. We have fought this in the 121 world for decades. Voice recorders were agreed to with the strict stipulation that the actual recordings never are released to the public, yet there have be audio releases after some major accidents anyway. Widows are hearing their husbands last scream before impact. Just not right...

As for CFIs - back in the 80's we were told not to allow video cameras during training flights for liability reasons. Supposedly, somebody's widow used a video to claim the CFI didn't teach a maneuver properly. (I wish I had some actual facts on the case to share on this.)

FYI - The FAA is gathering information on videos and pictures being posted on the internet to determine if they need to start enforcing PED use regulations already in place. Check out http://www.faa.gov/documentLibrary/m...N_8900.292.pdf

Paul A.
Jupiter, FL