Frist get this program Seabyrd Technologies - Blackberry Video Converter
Install 1.13e exe in the post above. It lets you set an input and output folder and default device 8100 or 8800.
I am having luck using this URL to convert Google and YT vids to .flv files. http://javimoya.com/blog/youtube_en.php
In BBVC I am having alot of luck with the 320x180 setting for the custom size.
I didn't think I would like this so much but I have a Three Stooges, 2 Lance Armstrong and Patches the Horse on it so far. Check out Patches Patches the Horse - Google Video