[spaqin]

The simplest solution of a video file on flash storage with the cheapest, minimum hardware required to display it would make it pretty much unhackable. On the other hand, I am not sure if the ad industry can resist getting it connected to the internet for maybe personalized (scan the plates around the truck?), most up-to-date ads they can serve.

[SapporoChris]

Like a personalized advertisement for a bail bonding service to the driver of the vehicle reported stolen.