diff --git a/app.js b/app.js
index a175017..0298e6a 100644
--- a/app.js
+++ b/app.js
@@ -85,6 +85,15 @@ function startStream() {
         if (state !== 'PLAYING') return;
 
         if (typeof event.data === 'string') {
+            if (event.data.startsWith('Error:')) {
+                statusEl.textContent = event.data;
+                statusEl.style.color = '#ff0000';
+                state = 'IDLE';
+                if (ws) ws.close();
+                setTimeout(() => resetToIdle(), 3000);
+                return;
+            }
+            
             if (event.data.startsWith('INIT:')) {
                 const p = event.data.split(':');
                 targetFps = parseFloat(p[1]);
diff --git a/ascii_video_player2.py b/ascii_video_player2.py
index b2e99f4..7c962f3 100644
--- a/ascii_video_player2.py
+++ b/ascii_video_player2.py
@@ -37,7 +37,7 @@ class VideoDecoder:
     def __init__(self, path: str, cols: int, rows: int) -> None:
         self._cap = cv2.VideoCapture(path)
         if not self._cap.isOpened():
-            raise FileNotFoundError(f"Video açılamadı: {path!r}")
+            raise FileNotFoundError(f"Could not open video file: {path!r}")
 
         self.fps         : float = self._cap.get(cv2.CAP_PROP_FPS) or 24.0
         self.frame_count : int   = int(self._cap.get(cv2.CAP_PROP_FRAME_COUNT))
@@ -294,9 +294,13 @@ if __name__ == "__main__":
 
     custom_palette = args.palette.split() if args.palette else None
 
-    renderer = TerminalRenderer(
-        path          = args.video,
-        palette       = custom_palette,
-        quantize_bits = args.quality,
-    )
-    renderer.play()
+    try:
+        renderer = TerminalRenderer(
+            path          = args.video,
+            palette       = custom_palette,
+            quantize_bits = args.quality,
+        )
+        renderer.play()
+    except FileNotFoundError as e:
+        print(f"\n[Error] {e}")
+        sys.exit(1)
diff --git a/stream_server.py b/stream_server.py
index 05bee6a..e668609 100644
--- a/stream_server.py
+++ b/stream_server.py
@@ -125,7 +125,12 @@ if __name__ == "__main__":
     app.state.cols = args.cols
     app.state.rows = args.rows
     
-    print(f"[{args.video}] ready to stream. Mode: {args.mode}, Res: {args.cols}x{args.rows}")
+    if not os.path.exists(args.video):
+        print(f"\n[WARNING] Video file '{args.video}' not found!")
+        print("The server will start, but streaming will fail until the file is provided.\n")
+    else:
+        print(f"[{args.video}] ready to stream. Mode: {args.mode}, Res: {args.cols}x{args.rows}")
+        
     print(f"Starting server... Please go to http://localhost:{args.port} in your browser.")
     
     uvicorn.run(app, host="0.0.0.0", port=args.port, ws_ping_interval=None, ws_ping_timeout=None)