In the video, a man is seen using a tool to tighten a screw. He then removes the tool and picks up a brush to clean the screw. The man appears to be working on some sort of mechanical device, possibly a piece of equipment or machinery. The tool he is using is a screwdriver, and the brush he picks up is a wire brush. The man seems to be focused on his task, carefully cleaning the screw with the brush. The video does not provide any additional context or information about the man or the device he is working on.