What you’re seeing is actually the user interface for Renoise, an app in a category of music tools called “trackers”, being animated directly. The little characters you’re seeing light up are events in the sequence, so as the sequence plays, so does the animation. (What you’re hearing as the musical background in the video is essentially unrelated, I’m guessing, but it’s nonetheless a wild idea.)
Seems a fitting way to celebrate the latest upgrade to Renoise and its arrival on Linux. making it tri-platform. (Very 2008 thing to be.)
By dodgyrecordings, who has some other good stuff; this entry is from a Beat Battle competition.
See dodgyrecordings.com for more.