FWIW, I met some of the blender developers (the guys who wrote the software that was used to create this movie) awhile ago - totally awesome people.
It isn't really clear from youtube, but this movie is entirely developed with open source software, and is licensed under a creative commons 'Attribution' license - which basically means that all of the content (3d models, etc) is available for you to re-use for almost any use, so long as you properly attribute the original creators.
The project website