I wish the film viewer were better so that it was easier to make decent-looking videos with it. It's buggy, and the video quality sucks in too many ways (clouds looking crappy, planes jumping around, wings disappearing instead of getting shot off, ships not being in the correct place while attacking -- lots of discrepancies between what you really see when you play vs. what you see in playing it back from film viewer).
To make vids that look OK, you pretty much have to do a vid capture. That takes such a giant amount of disk space, though.