some argue it could provide critical information for investigators, but as brian yannez reports, there some that are still against it. >> reporter: many pilots are begins cameras in cockpits. they see it as an invasion of privacy, imagine a camera recording ever everything you say and do at your desk. and they say video recordings can help after an accident. they say data recorders are sufficient. >> you have a recording of everything the airplane is doing, every single switch that is thrown. every change in the altitude or whatever else. what else do you need to feel accountable. >> reporter: the use of video cameras was proposed in 2000 by the ntsb. arguing cameras provide critical visual information, the missing link in unsolved accidents, like during an emergency where pilots in the cockpit, smoke from a fire did it fill up the cockpit, woe was doing what, when? >> we can see where the hands were, where the people were, sometimes, they get out of their seats, sometimes, we see a lever like a throttle pull back. the cliche that a picture is worth a thousand words is never more true