I still fail to see how the you tube video of the 757 over run aids the investigation. Any config such as slats/flaps/spoilers/autobrake/thrust is logged on the data recorders. AA most probably have QAR recoreders as well to quickly 'download' the data to the safety dept / ntsb etc etc. A passenger camera is not going to reveal any CRM issues beyond the locked door. The same goes for the A380. The aircraft was in one piece post touchdown and therefore all the bits and damage can be assesed without camera. Should the worst have happened such as with the AF A330, the camera belonging to the occupant of seat 7A will be knackered and useless to any investigation. As will a fire damaged camera post evac. the best that can be hoped for is to determine the carming qualities of the Captain's PA to the pax.