Why it worked
The video leverages a popular game format ('Prime Tower Guessing Game') and a well-known character (Homer Simpson) to create an engaging and interactive experience. The creator's decision to make the game harder by providing fewer hints increases viewer curiosity and encourages participation in the comments.
Summary
The creator is playing a game where viewers guess a 3D printed character based on the colors used in the print. They previously printed Homer Simpson and are now making it harder by providing fewer hints, only showing the color scheme of red, blue, black, and white.