Neat! Thanks for posting.
It's from Koichi at Tofugu --
I think your url above might be a little off
http://www.youtube.com/watch?v=YCWMG44H0I4
might work better.
The work around is getting a .edu address which mixi doesn't block it seems. ...for now, ...and while the Australian site keeps giving out the email addresses to non Australians ( I guess if you are learning Japanese you should class as a student or in education of some type though)
If you find reading faster / less annoying than watching a video
http://www.tofugu.com/2010/02/25/how-to ... l-address/