I feel like most documentaries have a hard time going that deep because most people don't leave behind such a specific record. (deadline.com)
Most documentaries explore things that have happened in a piece of time that has already occurred. (crunchonthis.com)
Well you'd be half right, most documentaries seem to only document things on a very superficial level, based on what the camera sees and that which takes place visually. (davidstrife7.net)