### Decentralized Learning Without Central Relays Traditional educational video platforms route all video and audio traffic through centralized media servers (SFUs/MCUs). For small study groups (2–10 learners), peer-to-peer WebRTC mesh architectures provide negligible latency, zero server bandwidth costs, and end-to-end cryptographic privacy. #### Establishing the Peer Connection Mesh Each participating browser opens a bidirectional `RTCPeerConnection` with peers in the study pod. Signaling is handled via ephemeral WebSocket handshakes, after which media and binary data streams communicate directly. ```javascript // Initializing P2P WebRTC DataChannel for synchronized video timeline scrubbing export function setupPeerDataChannel(peerConnection, onScrubReceived) { const channel = peerConnection.createDataChannel("classroom-sync", { ordered: true, }); channel.onopen = () => console.log("P2P Data Channel Ready"); channel.onmessage = (event) => { const data = JSON.parse(event.data); if (data.type === "SEEK_TIMELINE") { onScrubReceived(data.seconds); } }; return { broadcastSeek: (seconds) => { if (channel.readyState === "open") { channel.send(JSON.stringify({ type: "SEEK_TIMELINE", seconds })); } } }; } ``` ### Resilience and Reconnection If a peer encounters network jitter or NAT re-mapping, ICE restart routines seamlessly renegotiate candidate pairs in under 300 milliseconds.