This is a web-based chat and peer-to-peer video calling system. Let me break it down: 1. Chat Section (Left side) Shows a chat window where you and your friend can exchange messages. It supports text, emoji 👍, and image/media sharing.. Messages are labeled with "Friend" and "You". There’s a box with a random code like s10lwd — this is the room ID or session code. Both users must use the same code to join the same call. Buttons: 📞 Start/Join Call 🔄 Switch Camera (if supported) ❌ End Call ⛶ Fullscreen 🌙 Dark Mode Two video frames: Left: your camera feed (labeled "you"). Right: friend’s camera feed (labeled "friend"). 3. Call Status Text: "Call connected!" (in green) shows the peer-to-peer WebRTC connection is active. 4. Bottom Controls (during call) Screen Share (monitor icon) Toggle Microphone Toggle Camera 🔧 How it works (under the hood) The system is likely built with WebRTC + JavaScript. Steps: You enter or share the unique session/room code. Both users connect to a signaling server (could be powered by WebSocket, PeerJS, or similar). Once signaling is done, your browsers establish a direct peer-to-peer connection. Audio/video streams are exchanged directly between the two browsers (no central server needed for media). Chat messages and file transfers can also use the same WebRTC data channel. Basically: it’s a self-contained chat + video call web app — no external apps (like Zoom or Skype) needed.