BlackBerry Support Centre

Here is tutorial to download YouTube movies from internet for Blackberry Devices

1. Find your favorite video on youtube until you get favorite video
2. when it is able to remember the title of the video and then go to www.m.vuclip. com then enter the title of the video that was obtained in the youtube search box and click livelihoods and video that you enter will appear on the search
3. then click on the video title and select hi (for the video to good quality) or reg (for standard quality video) select as needed. or can also download audio and video pieces.

alternative methods is using keepvid. How to Download Videos from YouTube with KeepVid, here is the tutorial :

1. Open  keepvid. com on your BB browser
2. Add a link to the URL of the video on YouTube to form the URL (in the picture above are marked with red arrows).
3. Then Enter or press Download.
4. Click Download.