This is about Cyclotomic Polynomials and an interesting way to view them visually.

Part 2:    • Visualizing Cyclotomics Part 2 - Any ...  
Another Follow-up:    • Modifiers of Cyclotomic Polynomials  

There are some unjustified jumps in logic within the video. I did that to keep the length down - a video that covers every detail would be less entertaining - but I do have detailed notes written to support these 'claims'.