Some months ago there was a link to the CVR of the poor Swissair crew that went in off Halifax. I couldn't bear the thought of listening to their final moments but I'll bet plenty could. The CVR is supposed to be confidential isn't it? If material such as this can get out do you suppose they'll be able to keep video out of the hands of the TV production companies desperate to provide fodder for the populist channels. Hell, we could even have watched the 911 terrorists at work with their boxcutters. There's always someone somewhere willing to take a copy and leak it for whatever reason. Next thing you know it's on YouTube.
For this reason alone I will argue against cockpit video.