The video shows a person cleaning a large fish tank. The person is using a scraper to remove algae from the glass walls of the tank. The tank is filled with water and has several fish swimming around. The person is wearing gloves and is carefully removing the algae to ensure that the tank is cleaned thoroughly. The fish in the tank appear to be healthy and are swimming around calmly. The person is methodically moving the scraper along the length of the tank, ensuring that all the algae is removed. The lighting in the room is bright, and the water in the tank is clear. The person is wearing a black shirt and appears to be focused on the task at hand.