https://youtu.be/4cY3NweZ1xI
Our 2-man improv rock project has used MMV for years. The video linked above illustrates one of our uses of MMV - to provide interesting moving graphics for music that has no associated video.
For some of our other improv videos, we use MMV to provide movement to many of the animations that appear on the chroma-keyed screens:
https://www.youtube.com/watch?v=Dzy9VeJenNU
MMV is a great tool. I love the way that it encourages experimentation. I'm constantly pleasantly surprised at results I get with MMV even if the results aren't necessarily what I had in mind at the start!