The video shows a person playing a game on a mobile device. The game appears to be a side-scrolling platformer with a simple 2D pixelated design. The player controls a character that moves left and right, and jumps over gaps in the platform. The game environment is a dark cave with green platforms and occasional stars that the player collects. The player's thumbs are visible on the screen, indicating that they are controlling the game with touch inputs. The game seems to be challenging, as the player struggles to navigate through the level.