Well, there's the energy crisis solved right there.

Those Indians (dot not feather) are some clever fellows.

I hope no one actually falls for this. This is a two part video, notice the break in the video as soon as the guy steps aside. The second half of the video is likely run backwards, from right after they got the thing spinning by connecting a motor of some sort to the pully on the opposite end from the flywheel.

It's been a while since I have had a math or physics class, but I have concerns.