The video shows a group of small red fish swimming in a clear tank filled with water. The fish are bright red in color with black tails and fins. They are swimming around the tank, which has green plants and rocks. The tank appears to be well-maintained, and the water is clean and clear. The fish seem to be healthy and active, moving around the tank with ease. The green plants provide a nice contrast to the red color of the fish, and the rocks add a natural element to the tank. Overall, the video captures a peaceful scene of fish swimming in a well-cared-for aquarium.