This presentation introduces WebRTC, a technology enabling real-time communication (audio, video, data) directly in web browsers without plugins. The speakers detail its APIs (MediaStream, RTCPeerConnection, RTCDataChannel), showcasing examples and addressing browser compatibility, security (HTTPS, encryption), and multi-party call architectures (mesh, star, MCU). They also discuss signaling, STUN/TURN servers for NAT traversal, and available JavaScript frameworks and services simplifying WebRTC development. A live ukulele performance via WebRTC highlights its capabilities. Finally, a Q&A session covers various implementation details and future plans.