Explore the potential of WebRTC for building peer-to-peer networks in this 20-minute JSConf Iceland 2018 talk. Dive into the experimental yet powerful technology that enables real-time audio, video, and file sharing in a secure, decentralized manner. Learn how to establish peer connections using JavaScript and transmit data through data channels. Gain insights into the underlying WebRTC protocols, including STUN and TURN, and discover how to implement secure, decentralized file storage. Cover topics such as WebSockets, connecting pairs, signaling, NAT and firewalls, ICE servers, and troubleshooting communication errors.