Fix MoveNet output URL to return correct video path for frontend

app.py

@@ -258,7 +258,8 @@ def process_video_movenet(video_path):
         out.release()
         
         print(f"[DEBUG] Processed {processed_frames} frames out of {total_frames} total frames")
-        return output_filename
+        # Return the correct URL for the output video
+        return url_for('serve_video', filename=output_filename, _external=False)
         
     except Exception as e:
         print(f"[ERROR] Error in process_video_movenet: {str(e)}")