YouTube Music Video of the Day: The Chemical Brothers
Last year, I was involved in the technical organisation for a conference. This meant that I had to make sure that laptops, projectors and everything else were set up before the start of each talk.
Going back to the main room after the morning tea break one day to do a last minute check, I discovered some damn kids had disconnected the speakers and projector from the lectern computer and were using them to play this:

The Chemical Brothers – Star Guitar
It’s directed by Michel Gondry (There’s also an interesting making-of). One of the kids was enthusing about the technology that went into making the video – but I must have watched to at least a third of the way through before realising that it wasn’t just straight film from a train window.