I see....well I saw this online and so I am gonna try it and post some results. You can also add this in your browser If you do not want to install the application, you can visit the Vuclip link through Blackberry's Web browser at: http://www.vuclip.com
Click this link http://www.ehow.com/how_4608118_watc...lackberry.html
Vuclip is an application for Blackberry phones which converts the Youtube videos to a format suitable to view on Blackberry phone. On Google search, type "Vuclip Download". This will return you several application downloading website links from where you can download and install the Vuclip application.