if you have an iphone then you should have the 2.0 update by now, if so, go to the Apps store icon and it will be under the category music, the one they have now is $19.99 but on the jailbroken 1.5 version of the iphone there was a beta version but it was very limited and isnt like the one you see in the video.
so if you want what that dude had in the vid its gonna cost you $20