Interesting video to watch, not much else to say about it really.
Personally, I appreciate games that don’t just repeat the same exact audio clip constantly, and this covers that. I also don’t appreciate games that use multiple long audio clips to add variation, but it comes at the cost of memory (this video also covers that).
I believe this is called “spectrum analysis”, and is also known as “FFT”? I believe Unreal Engine didn’t actually support this without a plugin for a while, but I’m pretty sure this year it was officially integrated into UE4 and first used for Fortnite.