The video shows a person cleaning a fish tank. The person is using a brush to clean the glass walls of the tank. The tank is filled with water and there are several fish swimming around. The person is also using a vacuum cleaner to clean the bottom of the tank. The water in the tank is clear and there are no visible algae or debris. The person is wearing gloves and a mask while cleaning the tank. The fish in the tank are of different sizes and colors. The person is carefully cleaning the tank without disturbing the fish too much. The lighting in the room is bright and the tank is well-lit. The person is using a specialized cleaning solution to clean the tank. The video is shot from a side angle and the person is visible in the frame.