You can watch through the Bolt browser instead of the you tube app. it may be a smaller video window but at least it doesn't lag and freeze. I havent tried the You Vision app yet...I will now. Thanks.
YouTube app is available from AppWorld or you can get it from the 3rd Party app Sticky in the Apps Subforum in this section. If you get it from a web link, make sure your Browser is set to Blackberry emulation, otherwise the JAD installer won't be able to detect your handheld version properly.