The video shows a black mouse running on a wheel in a cage. The wheel is made of plastic and has a green and blue color scheme. The mouse is running at a fast pace, and its tail is long and thin. The cage is filled with wood shavings, and there are rocks and a piece of wood on the floor. The mouse's fur is shiny, and it has small, pointed ears. The wheel is spinning quickly, and the mouse is running in a circular motion. The video is shot from a close-up angle, focusing on the mouse and the wheel.