i used to have an alpine unit with a flip up screen. had to have a switched tied into the parking brake to trick the unit into showing video on the display while the car was moving. the way they had it setup from the factory made you have the car parked and the ebrake engaged.
Fun having mario cart64 in the car for sure
Does the manual say anything about using the video in and anything similar to the alpine unit about the parking brake or if it will work while in gear? Makes no sense to have a video input if you cant get anything simple like an n64 to work