class CamdemyFolderIE(InfoExtractor):
- _VALID_URL = r'https?://www.camdemy.com/folder/(?P<id>\d+)'
+ _VALID_URL = r'https?://(?:www\.)?camdemy\.com/folder/(?P<id>\d+)'
_TESTS = [{
# links with trailing slash
'url': 'http://www.camdemy.com/folder/450',