"I certainly hope not. The "motorist" (read, driver) should not be attempting to enjoy video content unless the car is parked, ergo, not whilst traveling, in the literal sense."
Good news. They don't, or I hope not. Basically the driver and the front passenger are incapable of watching any video. The way those LCD display are setup, the ones that can do video, there are a one or two wires, one goes to the ignition and the other to the emergency brake. The video will not play unless the ignition switch is turned to the proper position and the emergency brake is engaged. The ones you probably see are the ones in all the vans and SUV's in which it is for the backseat passengers only. Okay, Okay! Before anyone says anything, yes for the driver and front passenger, you can bypass the ignition and emergency brake safety feature so can watch video regardless, I am just saying that is not how they are installed at a dealer.