From 3e854bdf4a624d07286e330abf7918249cc7293a Mon Sep 17 00:00:00 2001
From: Sergey M <dstftw@gmail.com>
Date: Sat, 17 Oct 2020 23:14:09 +0700
Subject: [PATCH] Update ustream.py

---
 youtube_dl/extractor/ustream.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/youtube_dl/extractor/ustream.py b/youtube_dl/extractor/ustream.py
index 83e166264..9e860aeb7 100644
--- a/youtube_dl/extractor/ustream.py
+++ b/youtube_dl/extractor/ustream.py
@@ -75,7 +75,7 @@ class UstreamIE(InfoExtractor):
     @staticmethod
     def _extract_url(webpage):
         mobj = re.search(
-            r'<iframe[^>]+?src=(["\'])(?P<url>http://(?:www\.ustream\.tv|video\.ibm\.com)/embed/.+?)\1', webpage)
+            r'<iframe[^>]+?src=(["\'])(?P<url>http://(?:www\.)?(?:ustream\.tv|video\.ibm\.com)/embed/.+?)\1', webpage)
         if mobj is not None:
             return mobj.group('url')