In the video, a person is seen interacting with a group of fish in a tank. The person's hand is visible as they move it around, and the fish swim around the tank in response. The fish are of various sizes and colors, and they swim in different directions. The person's hand moves slowly, and the fish swim around it, sometimes coming close to the person's fingers. The tank appears to be well-lit, and the water is clear, allowing for a good view of the fish. The person's hand is the main focus of the video, with the fish moving around it in a seemingly playful manner.