The video shows a large aquarium tank with a school of fish swimming in it. The fish are yellow and silver in color and are swimming in a group. The tank is surrounded by a dark blue background, giving the impression of being underwater. The fish are moving in a coordinated manner, and their movements are smooth and graceful. The tank is well-lit, and the fish are clearly visible. The video is shot from a distance, allowing for a full view of the tank and the fish.