+ title = get_item('title', preferred_langs) or video_id
+ description = get_item('description', preferred_langs)
+ thumbnmail = xpath_text(playlist, './info/thumburl', 'thumbnail')
+ upload_date = unified_strdate(xpath_text(playlist, './info/date', 'upload date'))
+ duration = parse_duration(xpath_text(playlist, './info/duration', 'duration'))
+ view_count = int_or_none(xpath_text(playlist,'./info/views', 'views'))