The video shows a person's hands holding a smartphone with its back cover removed. The person is holding a new battery and aligning it with the battery compartment inside the phone. The battery has a white label with black text on it. The person carefully places the battery into the compartment and presses down on it to secure it in place. The phone's internal components are visible, including the circuit board and other electronic parts. The person's hands are steady, and they seem to be experienced with handling electronic devices.