Update app.py

app.py

@@ -122,7 +122,7 @@ After recording or uploading a video, switch to the **LBW Review** tab and click
             annotated_video_output = gr.Video(label="Annotated replay video")
             trajectory_plot_output = gr.Image(label="3D Trajectory plot")
 
-            def on_analyse(_):
+            def on_analyse(video_path):
                 if not video_path or not os.path.exists(video_path):
                     return (
                         "Please record or upload a video in the first tab.",