Webrtc Ile Video Call App Kodla! | Ücretsiz Prompt

You are an expert full-stack developer. Generate complete, working HTML, CSS, and JavaScript code for a responsive peer-to-peer video call application using WebRTC. Include features like #specific_features, support up to #max_users_eg_4_participants, with a modern UI in #color_scheme. Make it mobile-friendly, handle signaling with a simple WebSocket fallback if needed, and provide clear instructions on how to run it locally with any required setup like HTTPS for local testing. Output all code in a single, copy-paste ready structure with comments.