The video shows a close-up of a person's hand wearing a blue glove, holding a silver tool and working on the rear wheel of a bicycle. The person is adjusting the derailleur, which is a part of the bike's gear system. The bike has a black tire and a silver frame. The person's hand is steady and precise as they make adjustments to the derailleur. The video is shot in a well-lit room, and the focus is on the person's hand and the derailleur.