I am having a similar experience.
I am having luck using this URL to convert Google and YT http://javimoya.com/blog/youtube_en.php
I am using 1.13d of BBVC and having alot of luck with the 320x180 setting.
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