In this video, a man is seen using a wrench to tighten a bolt on a machine. The machine appears to be made of metal and has several other bolts and components visible. The man is wearing a black shirt and is standing in front of a metal wall. The wrench he is using is silver and has a long handle. The bolt he is tightening is located on the side of the machine and is also silver. The man is applying force to the wrench, turning it clockwise to tighten the bolt. The video is shot from a close-up angle, focusing on the man's hands and the machine.