fix

app.py

@@ -26,7 +26,7 @@ def fn(video: gr.Video):
   process_frame = FrameProcessor(detector, classifier, id_to_name)
   clip = clip.fl_image(process_frame)
   clip.write_videofile(output, fps=clip.fps, audio_codec='aac', logger=None)
-  return video
+  return output
 
 inputs = gr.Video(sources=['upload'], label='Input Video')
 outputs = gr.Video(interactive=False, label='Aeroplane Position and Action Marked')