thumb_format = determine_ext(info_dict['thumbnail'], u'jpg')
thumb_filename = filename.rpartition('.')[0] + u'.' + thumb_format
self.to_screen(u'[%s] %s: Downloading thumbnail ...' %
thumb_format = determine_ext(info_dict['thumbnail'], u'jpg')
thumb_filename = filename.rpartition('.')[0] + u'.' + thumb_format
self.to_screen(u'[%s] %s: Downloading thumbnail ...' %