In the video, a person is seen holding a power supply unit and inserting it into a computer case. The power supply unit is black and has a white cord attached to it. The person carefully aligns the unit and pushes it into the case, ensuring it is securely in place. The computer case is black and has a clear side panel, allowing a view of the internal components. The person's hands are visible, and they appear to be wearing a black shirt. The background is a workshop setting with various tools and equipment visible.