Yeah, I kept skipping sections of the video over all the theory of hearing parts and found that the "most popular visualization" discussion/demo starts at 27:40

Yeah, I kept skipping sections of the video over all the theory of hearing parts and found that the "most popular visualization" discussion/demo starts at 27:40 and just before at 24:22 shows the hue coloring by distance from/to root note on x-axis (and dissonance shown on y-axis but unclear how that's utilized). One common trap(?) they fell into is allocating hues by frequency, where humans are far more sensitive in distinguishing hues between red and green. So many of the blue/greens look pretty much the same. It may have been intentional because those higher intervals matter less but wasn't clear.