^http://www\.nicovideon?\.jp/watch/([a-z0-9]+)$ $str
^http://(?:[^/]+\.)?youtube\.com/(?:(?:verify_age\?next_url=/)?(?:w/)?(?:watch)?(?:\?|%3F)v(?:=|%3D)|(?:.+?/)?v/|vi/|.+?[?&]video_id=)([^&#]{11}).* $str
^http://nifnif\.nifty\.com/cs/catalog/nifnif_art/catalog_(\d{12})_1.htm$ $str