diff --git a/youtube_dl/extractor/kaltura.py b/youtube_dl/extractor/kaltura.py
index 6d4d93394..861b6952b 100644
--- a/youtube_dl/extractor/kaltura.py
+++ b/youtube_dl/extractor/kaltura.py
@@ -23,7 +23,7 @@ class KalturaIE(InfoExtractor):
                 (?:
                     kaltura:(?P<partner_id>\d+):(?P<id>[0-9a-z_]+)|
                     https?://
-                        (:?(?:www|cdnapi(?:sec)?)\.)?kaltura\.com(?::\d+)?/
+                        (?:(?:www|cdnapi(?:sec)?)\.)?kaltura\.com(?::\d+)?/
                         (?:
                             (?:
                                 # flash player
diff --git a/youtube_dl/extractor/mgoon.py b/youtube_dl/extractor/mgoon.py
index 7bb473900..56086f7b9 100644
--- a/youtube_dl/extractor/mgoon.py
+++ b/youtube_dl/extractor/mgoon.py
@@ -13,7 +13,7 @@ from ..utils import (
 
 class MgoonIE(InfoExtractor):
     _VALID_URL = r'''(?x)https?://(?:www\.)?
-    (?:(:?m\.)?mgoon\.com/(?:ch/(?:.+)/v|play/view)|
+    (?:(?:m\.)?mgoon\.com/(?:ch/(?:.+)/v|play/view)|
         video\.mgoon\.com)/(?P<id>[0-9]+)'''
     _API_URL = 'http://mpos.mgoon.com/player/video?id={0:}'
     _TESTS = [