Improve some _VALID_URLs

[youtube-dl] / youtube_dl / extractor / slideshare.py

diff --git a/youtube_dl/extractor/slideshare.py b/youtube_dl/extractor/slideshare.py
index 4967c1b7752e4ebfd0c1aac9b0d079c2dc843363..74a1dc672e7725f2f3500284a53ade4ca16c380d 100644 (file)
--- a/youtube_dl/extractor/slideshare.py
+++ b/youtube_dl/extractor/slideshare.py
@@ -14,7 +14,7 @@ from ..utils import (
 
 
 class SlideshareIE(InfoExtractor):
-    _VALID_URL = r'https?://www\.slideshare\.net/[^/]+?/(?P<title>.+?)($|\?)'
+    _VALID_URL = r'https?://(?:www\.)?slideshare\.net/[^/]+?/(?P<title>.+?)($|\?)'
 
     _TEST = {
         'url': 'http://www.slideshare.net/Dataversity/keynote-presentation-managing-scale-and-complexity',