The video shows a person's hand holding a small object and placing it on a rock in a fish tank. The rock is covered in coral, and the water is clear. The person's hand is visible, and they are wearing a ring on their finger. The small object appears to be a piece of food or a decoration for the fish. The fish tank is well-lit, and the coral is a mix of colors, including pink, purple, and white. The water is moving gently, and there are no fish visible in the video.