OK..... so I currently use 3 cameras and have a 4th that I'm setting up as a wide angle closeup to the lathe chuck.
The video mentioned, recorded in format .mov was taken with a Contour roam, one of my bike helmet cams (I say 'bike'..... let me be clear, my "bike" has a motor.
Contrary to what seems to be popular belief I DO NOT pedal my ass on the street...)....
I have a second Contour set up as a traveler also....
My main camera is a Sony Alpha series, a 7S with something called an "Art Lens" so it has no zoom, it just sets there at a known distance and looks perty. It takes wikked good audio. It's a total lightsucker, it will film under thee sylverie moon and make it look like broad daylight... GREAT hunting camera. It takes phenomenal video but doesn't especially like the bright lights over my lathe...........the Sony is file extension .mp4
The 4th one is stolen from an in-car setup..... a "dash-cam" and I haven't shot anything with it yet as it's AC and I need to plumb in my power supply. Maybe I'll hook it to a car ba'ddry and shoot some vid just to check it's properties.
So.... so far, file extensions;
.mov
.mp4