Renewable Revolution

Where can you observe one working? I'd like to see it.  Are there videos?

This is not running a generator, but Ferris wheels like this are turned by powerful internal combustion engines or electric motors in the USA. There is no way a person riding a bicycle generator could supply the energy needed to turn this Ferris wheel. consequently, you can assume that the power these humans are generating, if said Ferris wheel was turning a generator head, would be substantial. They are not world class athletes. They are probably very cheap labor. With heavy weights around the Ferris wheel and a race inside with people riding bicycles, the torque you could exert would be even more than is being produced in this video.