@Zecc that video is nearing 7 years old. I have been watching his videos for many years, due to being a woodworker. I think the coolest video of his, that is applicable to these forums is this one:
Which is now approaching a decade in age.
Pretty nifty though, a computer made of wood and powered by marbles.
And this Friday he posts a video where he sets up two computers, with web cams to take video of field mice that he tricks in to a maze with a mechanical contraption he built to kill mice that make it in to his shed.