Vixy

Ever wished you could download and keep YouTube videos? Now you can!

vixy.net allows you to download youtube(.flv) flash video into movie format directly to your PC or iPod. I've been using this service to download Hatsune Miku's songs direct to mp3. :)

Best of all, this service doesn't need you to register and it is free!

~Update!!~ Because YouTube has been doing maintenance, this service is slightly affected. Just keep trying! Remember it's free.