In the video, a person is seen working on a large engine. The person is using a tool to adjust the valves on the engine. The engine appears to be quite large and complex, with multiple valves and components visible. The person is wearing protective gear, including gloves and safety glasses, and is focused on their task. The background is not clearly visible, but it seems to be an outdoor setting, possibly a garage or workshop. The person's movements are deliberate and precise, indicating that they are experienced in working with engines.