A couple of weeks ago I came across a trailer for an up and coming show called Viralcom (embedded below).
The series follows Viralcom and takes you behind the scenes to see how all the classic YouTube videos are made, or would be made if a large organisation was behind them.

[youtube:http://www.youtube.com/watch?v=aB-mdz1hqAs]

A new 5 minute episode is released every week and its a great watch, they have even got the actual guy who did that awful Chocolate Rain song.

As of this post there are 4 episodes up there and you can see them on the Viralcom channel