diff --git a/py34/url.py b/py34/url.py
index 2dbe42b..e3d93e7 100644
--- a/py34/url.py
+++ b/py34/url.py
@@ -3,7 +3,7 @@ from os.path import splitext
 
 
 IMAGE_FORMATS = ["jpeg", "jpg", "png", "gif", "mp4", "webm"]
-_VIDEO_FORMATS = ["mp4", "webm"]
+VIDEO_FORMATS = ["mp4", "webm"]
 
 
 class ViewURL: