Of course, there is a a YouTube video! A bit grainy, because of the lighting conditions on my desk -- I might make another version with better lighting.
Edit: As per merle_'s suggestion, I cut the number of lit LEDs in half, by making two sets of 64 random bits and ANDing those together. Statistically, about 25% of the LEDs will be lit, but the spread is much wider, which makes for much more attractive patterns. I also built in a delay to change the pattern only twice per second.
See the video of version 2 here.