Update app.py

app.py

@@ -29,6 +29,9 @@ def upload():
     if video.filename == '':
         return 'No selected file', 400
 
+    # Ensure upload folder exists
+    os.makedirs(app.config['UPLOAD_FOLDER'], exist_ok=True)    
+
     filename = f"{uuid.uuid4()}.mp4"
     filepath = os.path.join(app.config['UPLOAD_FOLDER'], filename)
     video.save(filepath)