I did some crazy formula work in Excel to figure out category connections (it was already sorted by semantic similarity so I’m trusting that work) and then used https://gephi.org/ . I only used it for two other things before in the past few years but it’s logical enough to use and suddenly had this nice graph.
So, I screen recorded me poking around in it for three minutes, found music that had the right feel (that was royaty-copyright free), had to speed up what I did by 2x to fit the music, and stuck it together.
The only other timing I did with the music, is go backwards from the “big bang” matching it with the “bass drop” moment of the song so that it would line up.
Any other timing similarities is a nice happenstance / created by the viewer.