A:AnswerVideos may be downloaded from the micro SD card or from the APP. Videos on the card will be overwritten so no need to delete any. There is no batteries. This is a capacitor camera.
A:AnswerMaybe.
It seems decently made. The issue is finding the right kind of vibration dampening that keeps the vibration load mostly within what the device can tolerate and what is a visually useful output. There are many ways to do this on the internet.
Any hardware store has silicone squares of different thicknesses that can be placed between a mount and the camera. Or, even use an Alex caulk, of various densities, to make your own custom shaped cussions.
A:AnswerI can't speak for all states, but the ones I've lived in, Texas and Florida, they were legal.
I highly recommend you Google that question either for all states, or for your specific state to find out for sure.
I will say there's no logical reason for them to be illegal, but there's always some random laws out there.