Does this system record hours of video (so you can monitor a repair facility, or find someone vandalizing the car) or just it just buffer the last 5,10 minutes (for capturing the events leading to an accident)? Or is it just a matter of adding memory?

Almost a million miles driving and I dont think I've ever been in a situation where the video was needed. (And a few where the video would not have been to my benefit if law enforcement had it.)

There was one case where I was cited, and ultimately won. Video might have made it quicker.

What are we talking $$$ wise... for folks so inclined?