Version in the original post:
http://www.youtube.com/watch?v=C-287ehU1U4
And version with only the MMD anime gals:
http://www.youtube.com/watch?v=i4LbZWnej_s
I'm amused they even included the 4th guy in the background.
Here is the same one but they deleted the 4th guy, added more shading, de-spikified the left one, and put them on stage:
http://www.youtube.com/watch?v=dHs0y8xZJnU
This also seems like the same "engine" and recording but with totally different characters:
http://www.youtube.com/watch?v=AJLuSh3ECzc&
But it's not just variations on this one. I wonder if it was a MikuMikuDance programming competition, because there are tons of these videos. They actually cut the video short, but there is a longer version, such as this one that only focuses on the spiky haired guy, for the entire video.
http://www.youtube.com/watch?v=lD_ytkmxYk8
However, most of the videos out there are less accurate. For example, this one has jiggling boobies, on a woman in chains, but the body movements are less smooth, and the mouth animation is less accurate too.
http://www.youtube.com/watch?v=6E3uAwaq28w
And then some are even more inaccurate with regards to the facial movements, which would suggest if there is a Kinect capture, it's only capturing the very gross movements.
http://www.youtube.com/watch?v=MS33n1ZbDCI
And finally, this is the Samantha Carter as a dancing German soldier version:
http://www.youtube.com/watch?v=btHW36KHtOw