In the video, a man is seen placing rocks into a fish tank. The rocks are of various sizes and shapes, and the man carefully arranges them to create a natural-looking environment for the fish. The fish tank is filled with clear water, and the rocks are placed on top of a layer of sand. The man's movements are deliberate and precise, indicating that he is experienced in setting up fish tanks. The lighting in the room is bright, and the focus of the camera is on the man and the fish tank. There is no visible title, subtitle, or other text in the video.