webpage, 'description', default=None, group='description')
thumbnail = self._search_regex(
r'poster\s*=\s*(["\'])(?P<thumbnail>[^\1]+?)\1',
webpage, 'description', default=None, group='description')
thumbnail = self._search_regex(
r'poster\s*=\s*(["\'])(?P<thumbnail>[^\1]+?)\1',