Well, it would be kind of boring to film the 40 hour duty days, but easy to shoot the tool-boxes full of pencils..
Seriously, there is some clean freight outfits flying modern -400s, MD-11 and B-767 stuff where the hot water heater works and the blankets are abundant.
On the other hand, plenty of scum-bag freight stuff still going on:
I worked for a few of them and last one, Tradewinds Airlines is just about out of business now.
Could tell some stories there and there is even some ready made film of a crash we had in 2006:
YouTube - Tradewinds Boeing 747 Rejected Takeoff Crash
Head down to MIA and ride around with a few of the carriers doing nightly runs on South America and you should find material enough to fill a couple of hours footage: Overweight takeoffs out of Quito or Bogota are always interesting if an engine or two fails, but even with all 4 running you can get terrain warning...That will wake ya up at 4 in the morning..
