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It strike me after watching this video is that when you are learning dancing, you really don’t care too much about the models or the teachers. What you really care about are the moves, the elegance, smoothness and the confidence on the floor. All those come from the details collaborated combination of body parts movement. That’s why people buy video so that they can watch it over and over again. With video, you can rewind, backward, forward, slow frame, etc. However, the angles are fixed and you can’t see it from different angle to get more detail and precise movements. So really you have to use your imagination quite often.
Now, what if a application is developed using, say, Flex/AIR, offered online or offline. All the moves are extracted from the learn to dance video and 3D-tize it. When you are learning the move, not only you can go back and forth. You turn it to different angles to see other side of the body parts within the same move. This way you can totally focus on mimic the move rather than doing some guess work as well. You can see this technology can be used beyond the dance learning.
Too bad so far there isn’t anything like this. So, to my friend the best choice available is the dance video he bought. Good luck and happy party!