The video features a close-up shot of a person's hand holding a black pen. The person is seen unscrewing the cap of the pen, revealing the ink cartridge inside. The camera focuses on the ink cartridge as the person removes it from the pen. The video provides a detailed view of the ink cartridge, showcasing its design and structure. The person then proceeds to replace the ink cartridge back into the pen, securing it in place. The video ends with the person holding the pen with the cap back on.