The video shows a large, glass-sided aquarium, likely outside on a tiled surface. The aquarium is densely populated with numerous fish, a mix of koi and goldfish in varying colors, including red, orange, white, and black. The water in the aquarium appears somewhat cloudy. The camera angle is slightly angled downwards, providing a top-down view of the fish inside the aquarium. There is also some condensation or mineral buildup visible on the glass.