In the video, a person is seen holding a spark plug in their hand. The spark plug appears to be dirty and worn out. The person then proceeds to unscrew the spark plug from the engine. The engine is not visible in the video, but the sound of the engine can be heard in the background. The person then holds up the spark plug to the camera, showing it to the viewer. The spark plug has a metal body with a black insulator at the top. The person then places the spark plug back into the engine, screwing it back in until it clicks into place. The video ends with the person holding the spark plug in their hand again.