That died a very quick death when ALPA dug it's heels in and determined the real reason was to use the videos for potential disciplinary action. And you are justifying the use of CCTVs for the exact same thing. As long as the number of takeoffs and landings are equal and no limits are busted, we can thank glass cockpits for the snitch function, what difference does CCTVs make? None!
" As long as the number of takeoffs and landings are equal, and no limits are busted": Everybody wants to see thant, and people to work by the book. By how do you ensure that no limits are busted? You always have staff company cutting corners and that's how people get killed.
"ALPA dug it's heels in and determined the real reason was to use the videos for potential disciplinary action": of course, there will always be some rotten employers who will use it that way. But in the end, if you do the job you are paid for well, follow the rules...., there is very little to be afraid of. Similar to speed camera, CCTV in shops.... if you don't drive too fast if you don't steal in shops....
How many accidents are never really fully solved because we just don't have a full picture of the situation in the cockpit at the time of the accident? Voice recorder, telemetry tells a lot but not everything, as others stated too.
But again, we all have our views on the topics. And the decision to have stuck equipment or not has to be taken by regulators... but I am fairly sure that we will see it in the future under one form or another and for one reason or another.