what if you type
http://www.youtube.com/ into the search area?
Oh I was thinking you had the Nexus ...
Since YouTube videos are mainly FLV (Flash Video) files, and Adobe Flash is unsupported on Android 2.0, YouTube through the browser app is not natively supported on the Cruz. See also for more info: Will it work on my Cruz?
A 3rd party app like the ones mentioned here can provide some YouTube video playback functionality.
app YouTube is a low-res app available online.
appSkyfire is another app that allows for some Flash video functionality.
http://cruzsupport.velocitymicro.com...ube-on-my-Cruz
Not sure which model # you have T 100 etc?