The video shows a close-up of a car engine, with a focus on the alternator. The alternator is made of metal and has a series of copper coils inside. The camera moves around the alternator, giving a detailed view of its structure and components. The alternator is attached to the engine, and the video shows how it is connected to the car's electrical system. The alternator's coils are visible through a series of holes in the metal casing, and the camera zooms in to show the intricate details of the coils and the alternator's construction.