r'<span itemprop="uploadDate">([^<]+)</span>', webpage, 'timestamp', fatal=False))
duration = parse_duration(self._html_search_regex(
r'<meta itemprop="duration" content="PT([^"]+)">', webpage, 'duration', fatal=False))
r'<span itemprop="uploadDate">([^<]+)</span>', webpage, 'timestamp', fatal=False))
duration = parse_duration(self._html_search_regex(
r'<meta itemprop="duration" content="PT([^"]+)">', webpage, 'duration', fatal=False))