It plays random videos, one after the other. There might be a (not the most legible) status bar at the bottom, saying something like "Video looks stuck! Try clicking to start!"

About the videos:

> Videos should be unusual in nature and seem as though they could be from an alternate dimension, with varying degrees of uniqueness, strangeness, and otherworldly qualities therein.

I think it's randomly drawing from that subreddit, results can be interesting or not so interesting.