The video starts with a red and white "subscribe" button on a black background. The button is rectangular with rounded corners and has a white outline. The word "subscribe" is written in white capital letters on a red background. The button is followed by a white bell icon on the right side. The video then shows a cursor clicking on the button, which changes to a gray "subscribed" button with the word "subscribed" written in white capital letters on a gray background. The bell icon remains the same. The video ends with the gray "subscribed" button.