Our own Will did it first and best (especially the cork screw joke). What the BBC describes as "UKIP backers" have now set up a whole spoof site of "Webcameron". Unfortunately they haven't properly embedded the video so you have to go to youtube.com to watch it. Also, all they have on offer is the Time Trumpet "Changes" video, which most of us polanoraks have already seen and enjoyed.
I still prefer Will's opus.