So, we were sent a bunch of weird little cards through the mail at work.
Open them up and, it's an actual screen with a video playing!!
I couldn't leave it at that though, so took a couple home and tore one to pieces.
Turns out, at it's heart is a 256MB memory chip, and a circuit which will play any mp4 files you put on there, and there's a USB port which lets you just use it as a plug & play external drive, and which will recharge the battery. There are buttons for power, pause, play and next video.
So my plan, is for some scenery featuring a big billboard which I can get to play whatever video file I feel is appropriate! Any ideas for what videos I should put on there?