It would be a real nice feature.
I use Game Commander and have a command to start and stop filming. Easy to do becuase I don't have to take my hands off stick to start or stop the film, just say "Gun Camera"
Still, I have to remember to say it.
I think it would be easy/nice (if HTC is reading this) to make the film start and stop buttons different. When they are the same, you can get the toggle out of sequence from programmable sticks, which can be very annoying.
I had it set up on my Thustmaster FLCS to toggle film ON when I pulled the trigger, and toggle again 4 seconds after I released. This worked ok, but If I did multiple short bursts with the trigger, the toggle would get out of sequence. Seperate buttons would fix that easy.
<SALUTE>
Midnight
13th TAS
"Toggles suck for programability of external peripherals"