diff --git a/main.go b/main.go
index 4c6119b..b7d4fb3 100644
--- a/main.go
+++ b/main.go
@@ -45,9 +45,20 @@ func main() {
 	sigCh := make(chan os.Signal, 1)
 	signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM)
 
+	// Initialize application.
+	app := &App{Config: cfg, ConfigPath: configPath}
+
+	// Start go2rtc if enabled.
+	if cfg.Go2RTC.Enabled {
+		go2rtc := NewGo2RTCManager(cfg.Go2RTC)
+		if err := go2rtc.Start(cfg.Cameras); err != nil {
+			log.Printf("go2rtc: start failed: %v", err)
+		}
+		app.go2rtc = go2rtc
+	}
+
 	// Start the HTTP server (blocks).
 	errCh := make(chan error, 1)
-	app := &App{Config: cfg, ConfigPath: configPath}
 	go func() {
 		errCh <- app.StartServer()
 	}()
@@ -92,6 +103,7 @@ type App struct {
 	Config     Config
 	ConfigPath string
 	server     *Server
+	go2rtc     *Go2RTCManager
 }
 
 // StartServer initializes and starts the HTTP server.
@@ -106,6 +118,9 @@ func (a *App) StartServer() error {
 
 // Shutdown performs a graceful shutdown of all services.
 func (a *App) Shutdown() {
+	if a.go2rtc != nil {
+		a.go2rtc.Stop()
+	}
 	if a.server != nil {
 		a.server.Close()
 	}
diff --git a/public/app.js b/public/app.js
index 919e8d1..0483931 100644
--- a/public/app.js
+++ b/public/app.js
@@ -70,11 +70,20 @@ function renderLiveGrid() {
         tile.className = 'grid-tile' + (cam && cam.enabled ? '' : ' offline');
         tile.dataset.camId = cam ? cam.id : '';
 
-        if (cam) {
+        if (cam && cam.enabled) {
+            // go2rtc snapshot endpoint — refresh every 2 seconds for live preview.
+            const snapshotURL = `http://${location.hostname}:1984/api/frame.jpeg?src=${cam.id}_sub`;
             tile.innerHTML = `
+                <img src="${snapshotURL}" class="grid-snap" onerror="this.style.display='none'"
+                     style="width:100%;height:100%;object-fit:cover;position:absolute;inset:0" alt="${cam.name}">
                 <span class="tile-status ${cam.online ? 'online' : 'offline'}"></span>
                 <span class="tile-label">${cam.name}</span>
             `;
+            // Auto-refresh snapshot.
+            setInterval(() => {
+                const img = tile.querySelector('img');
+                if (img) img.src = snapshotURL + '&t=' + Date.now();
+            }, 2000);
             tile.addEventListener('click', () => openFocus(cam));
         } else {
             tile.innerHTML = '<span class="tile-placeholder">No Camera</span>';
@@ -97,10 +106,10 @@ function updateFocus() {
     const cam = cameras[focusIdx];
     document.getElementById('focus-title').textContent = cam.name;
     document.getElementById('focus-time').textContent = new Date().toLocaleTimeString() + ' live';
-    // TODO: M3 — connect to go2rtc WebRTC stream
+    // go2rtc MSE stream for full-quality playback.
     const vid = document.getElementById('focus-video');
-    vid.src = '';
-    vid.poster = ''; // placeholder until go2rtc is wired up
+    vid.src = `http://${location.hostname}:1984/api/stream.m3u8?src=${cam.id}_main`;
+    vid.play().catch(() => {});
 }
 function renderThumbs() {
     const strip = document.getElementById('focus-thumbs');