A fan video, a sort of homemade commercial, and of course, a YouTube smash - this is the one that really fulfills BUG's tagline: the evolution of music video.

It was made by Dennis Liu, a recent graduate of NYU film school, and now a TV producer at New York ad agency BBDO. Not sure if his employers take kindly to him making free commercials for a client that they don't even have - but it is brilliantly effective both as a video and an ad.

It's also lured the Apple ultra-geeks to have their say on YouTube - which proved a rich source of fun for BUG host Adam Buxton. But Dennis has talked about the making of the video on the unofficial Apple weblog TUAW.