<p>➀ Guides users to build a portable Raspberry Pi Zero webcam system using a mobile hotspot for global live streaming and motion detection; </p><p>➁ Leverages open-source Motion software for low-resource video processing and ZeroTier VPN for secure internet access without router configurations; </p><p>➂ Provides hardware setup instructions and software configuration steps for dual functionality as a surveillance device with timestamped recordings.</p>