In the video, a person is seen demonstrating how to adjust the light on a bicycle. The person's hand is visible, and they are holding the light and turning it to show how it works. The light is circular and appears to be attached to the front of the bicycle. The person's hand is shown turning the light on and off, and they also adjust the angle of the light. The background of the video is a street with trees and a trash can visible in the distance. The light appears to be bright and effective, and the person seems to be satisfied with its performance.