The video shows a stingray swimming in a tank of water. The stingray has a long tail and a flat body with a pointed nose. It moves its body in a smooth, gliding motion, and its tail undulates as it propels itself through the water. The tank appears to be a large, clear enclosure, possibly in a marine park or aquarium. The water is clear, and the lighting is bright, highlighting the stingray's features and movements.