The video shows a close-up of a fish tank with a black fish swimming around. The fish is seen swimming near the bottom of the tank, surrounded by green plants and brown branches. The tank appears to be well-maintained, with clear water and no visible debris. The fish moves smoothly through the water, occasionally darting between the plants and branches. The lighting in the tank highlights the vibrant colors of the fish and the plants, creating a serene and calming atmosphere.