This is one of my favourite WoW videos of all time.
This was made for a competition on the Discovery Channel where contestants had to make their own versions of the Discovery Channels The World is Just awesome advert. I've inserted the original below as well.
Boom De Yada
The maker behind this is called Irdeen and you can check out his page at http://irdeenproductions.blogspot.com/
The World Is Just Awesome Ad