The video shows a close-up of a person's finger tapping on a smartphone screen. The phone screen displays a timer with a green start button and a pause button. The person taps on the start button, and the timer starts counting up. They then tap on the pause button, and the timer stops. The person repeats this action several times, tapping on the start button to start the timer and the pause button to stop it. The timer screen is clear and easy to read, with white numbers on a black background. The green start button and pause button are clearly visible and easy to distinguish. The person's finger is steady and precise as they tap on the buttons.