Physics simulation, Huolong ... the hair can be assigned qualities like thickness, weight, springiness, give, etc. Same as the clothing.

The dances were motion-captured BVH files, Bobasaur, and I did manually edit them to some degree. Mike the TV is in Free Stuff; he's by Talon69. The architecture video was created with Maz's cartoon dungeon props; I don't think he's released them yet. Everything was rendered in Poser 4, even the room with the reflecting mirrors.

bikermouse:
Some of the videos have sound (the Sabrina clips, Florence #1, Mike the TV); others don't. They're all standard MPEG-1 videos. They should work properly in both Windows Media Player and Apple's QuickTime player, with no need for codecs beyond the ones already built-in.