Update app.py

app.py

@@ -414,7 +414,7 @@ class LoiteringDetector:
         return output_path
 
 
-        def process_video(feature, video, area=None):
+def process_video(feature, video, area=None):
     detectors = {
         "Crowd Detection": CrowdDetection,
         "People Tracking": PeopleTracking,