It's one of several scenes from the 3d graphics benchmark software 3DMark (the version from 2006 to be precise). The graphics in this video can all be rendered in real time on current-day hardware with ease. Basically all you need is a grahpics card that was high-end back in 2006, or anything better.

My guess is that there is no one single artist behind it but probably a group of artists each specializing in particular things. Some programmers for the 3d engine, some programmers for the directx shaders, people to make the model and textures.

The tech demo for 3DMark 11 is quite nice too:
http://www.youtube.com/watch?v=xEQrPZntkU8&fmt=37

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