Do you have an iPhone or iPad? You can use the iPhone app on your iPad but it's not pretty or clean. I read they are suppose to come out with an iPad app in a couple of month. But check out Jasmine. It's a free app and I even like it better than the original YouTube app that we lost.
I was wondering if there is a proper youtube app yet? I have the one which is pretty much just a link to safari and the youtube mobile site! Not a masterpiece I must say!