class YoutubeTruncatedURLIE(InfoExtractor):
IE_NAME = 'youtube:truncated_url'
IE_DESC = False # Do not list
- _VALID_URL = r'(?:https?://)?[^/]+/watch\?feature=[a-z_]+$'
+ _VALID_URL = r'''(?x)
+ (?:https?://)?[^/]+/watch\?feature=[a-z_]+$|
+ (?:https?://)?(?:www\.)?youtube\.com/attribution_link\?a=[^&]+$
+ '''
def _real_extract(self, url):
raise ExtractorError(