In the video, a person is seen holding a chain with their left hand while using a tool in their right hand to adjust it. The person is wearing a black glove on their left hand and a watch on their right wrist. The chain appears to be made of metal and has a series of links. The tool being used is not clearly visible, but it seems to be a type of wrench or adjustment tool. The person's actions suggest that they are either tightening or loosening the chain.