In the video, a person is seen setting up a fish tank. The tank is filled with water and has a variety of decorations, including rocks and plants. The person is carefully placing the decorations into the tank, making sure they are secure and properly positioned. The tank is well-lit, and the water is clear, allowing for a good view of the decorations. The person appears to be taking their time to ensure that the tank is set up correctly, and the decorations are arranged in a way that is aesthetically pleasing. Overall, the video provides a detailed look at the process of setting up a fish tank, from the initial placement of decorations to the final touches.