The video shows a person using a tool to adjust the tension of a bicycle chain. The person is seen using a small tool to adjust the tension of the chain, and then they use a larger tool to make further adjustments. The person's hands are visible in the video, and they appear to be wearing a red shirt. The video is shot from a close-up angle, focusing on the person's hands and the bicycle chain. The background is blurred, but it appears to be a workshop or garage setting. The lighting in the video is bright, and the colors are vibrant.