Update README.md

README.md

@@ -29,6 +29,7 @@ Original file is located at
 ### To make the video appear, it is necessary add the following code after importing VecVideoRecorder but before calling package_to_hub:
 
 
+```python
 from stable_baselines3.common.vec_env import VecVideoRecorder
 
 def _vec_video_recorder__getattr(self, name):
@@ -39,7 +40,9 @@ def _vec_video_recorder__getattr(self, name):
     if _orig_vec_video_recorder_getattr is None:
         raise AttributeError(name)
     return _orig_vec_video_recorder_getattr(self, name)
+
 _orig_vec_video_recorder_getattr = getattr(VecVideoRecorder, "__getattr__", None)
 setattr(VecVideoRecorder, "__getattr__", _vec_video_recorder__getattr)
 
 
+