In the video, a person is seen holding a black phone in their hand. The person then proceeds to attach a black case onto the back of the phone. The case appears to be made of a hard plastic material and fits snugly onto the phone. The person then adjusts the case to ensure it is properly aligned with the phone's camera and buttons. Throughout the video, the person's hands are visible, and they seem to be demonstrating how to properly attach and adjust the case onto the phone.