Explore a comprehensive tutorial on Trango, a self-hosted, open-source system for LAN-only audio and video calls with file sharing capabilities. Learn about this innovative solution for businesses, universities, or home communication networks. Follow along as the video demonstrates the smooth Docker installation process and utilizes NGinX Proxy Manager to set up a proper URL, SSL certificate, and mobile device access. Discover how to implement Trango in your network, configure NGinX Proxy Manager, and set up access control lists for enhanced security. Gain insights into the practical applications and benefits of this LAN-based communication system through hands-on demonstrations and step-by-step instructions.