My favorite YouTube app for BlackBerry is FastTube. It has a lot of features that the YouTube app for Android has, but with BlackBerry flair and cascades.
It gets updated from 184.108.40.206 to 220.127.116.11, and with that, it brings the following:
* The ability to pre-load 5 videos in the free version.
* Added to universal search. (Big plus)
* Option to shorten video share url.
* Continuous play of pre-loaded videos.
* Minor bug fixes.
This is a free app to start, but if you want to sign in to your YouTube account, it will cost you .99 cents.
If you want to give it a try, you can find it in the BlackBerry World by clicking the link.
Enjoy and happy YouTubing.