youtube-dl
http://www.arrakis.es/~rggi3/youtube-dl/
I can't use Japanese right now because of uim. I'm trying to downgrade uim again...
Anyway, this is a Python script which enables you to downlaod youtube video stream to your disc. I'm using FreeBSD and no flash support so I desperately need this kind of tool and this works great.
Benri-desuyo !!!.