If anyone else is using a Roku set top box you can add the secret Youtube channel (still in beta) by logging into your roku account and using the code B8VVK.
For full instructions check out this article.
http://www.hackingnetflix.com/2010/06/private-youtube-channel-for-roku-player-beta-or-hack.html (http://www.hackingnetflix.com/2010/06/private-youtube-channel-for-roku-player-beta-or-hack.html)
Youtube joins Netflix, Hulu Plus, Amazon Video, Media Fly, TWiT, Revision3, Pandora, Last FM, Flickr, and other channels.