duration = parse_duration(self._html_search_regex(
             r'<span class="duration">\s*-?\s*(.*?)</span>',
             webpage, 'duration', fatal=False))
         duration = parse_duration(self._html_search_regex(
             r'<span class="duration">\s*-?\s*(.*?)</span>',
             webpage, 'duration', fatal=False))