It is trying to use your voting history during a session to line up the best video to show you next without repeating.

It balances certain priorities. It starts by showing you popular videos and then based on how you vote shows you similar ones, while mixing in new videos so that they can get profiled.

About 20% of the time it will show you a random video that h received positive reviews overall.

If people have ideas about cool algorithms to try, I'm all ears. How is it doing?