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-rw-r--r--youtube_dl/extractor/teachingchannel.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/youtube_dl/extractor/teachingchannel.py b/youtube_dl/extractor/teachingchannel.py
index d14d93e3a..e89759714 100644
--- a/youtube_dl/extractor/teachingchannel.py
+++ b/youtube_dl/extractor/teachingchannel.py
@@ -7,7 +7,7 @@ from .ooyala import OoyalaIE
class TeachingChannelIE(InfoExtractor):
- _VALID_URL = r'https?://www\.teachingchannel\.org/videos/(?P<title>.+)'
+ _VALID_URL = r'https?://(?:www\.)?teachingchannel\.org/videos/(?P<title>.+)'
_TEST = {
'url': 'https://www.teachingchannel.org/videos/teacher-teaming-evolution',