The video shows a person using a wrench to tighten a bolt on a bicycle. The person is wearing a white shirt and is standing in front of a blue bicycle. The bicycle is leaning against a wall, and there is a chain visible in the background. The person's hands are visible as they use the wrench to turn the bolt clockwise. The bolt appears to be silver and is located on the frame of the bicycle. The person's movements are deliberate and precise as they ensure the bolt is tightened securely.