The video shows a close-up of a computer's interior, specifically focusing on a water cooling system. The cooling system is composed of a large, cylindrical, transparent tube filled with a green liquid, which is likely a coolant. The tube is connected to a series of metal components, including a pump and a radiator. The liquid is seen flowing through the tube, indicating that the cooling system is operational. The components are housed within a metal case, and the entire setup is illuminated by blue LED lights, which add a visually appealing effect to the system.