Update app.py

app.py

@@ -33,7 +33,14 @@ def extract_metadata(url, cookies_file=None):
 
         if cookies_file and os.path.exists(cookies_file):
             print(f"🔐 Using cookies file: {cookies_file}")
-            ydl_opts['cookiefile'] = cookies_file
+            # Validate Netscape format header
+            with open(cookies_file, "r", encoding="utf-8", errors="ignore") as f:
+                first_line = f.readline().strip()
+                if "# Netscape HTTP Cookie File" in first_line:
+                    ydl_opts['cookiefile'] = cookies_file
+                    print("✅ Valid cookies format detected")
+                else:
+                    print("⚠️ Invalid cookies format. Skipping cookies.")
         else:
             print("⚠️ No cookies file provided or path invalid.")