The video shows a fish tank with a black background and a group of fish swimming around. The fish are of different sizes and colors, including a large white fish with long fins and a smaller black and white fish. There are also small yellow pellets scattered on the bottom of the tank. The fish are seen swimming around and interacting with each other, with some fish swimming towards the camera and others swimming away. The lighting in the tank is dim, creating a calm and serene atmosphere.