Of course, Im sure you have heard the "it is illegal to watch movies while driving" bit, and that these units are meant to be watched while parked. On all the units i have installed, the parking break wire is grounded out when the parking brake is engaged. So to bypass it, all one would have to do is either hook it up to the ground, or sometimes a switch is need. The parking brake wire would go to one side of the switch, and a ground wire would go to the other side of the switch. I personally like this setup, cause if you get stopped, a flick of a switch turns off the video. Just make sure you put the switch somewhere not visible from outside the car