Why it worked
The video combines a popular game mechanic (Flappy Bird style) with musical performance, creating a unique and engaging visual experience. The novelty of playing a game with a guitar and voice likely captured viewer attention.
Summary
A person plays a guitar while a game interface with pipes and a bird character is overlaid on the screen. The player appears to be interacting with the game through their voice and guitar playing, with visual cues indicating success or failure.