FLV Online Converter - vixy.net
This page is an online converter, you just type in the URL from youtube/google, and select what format u want the video to be in from the dropdown list. There are a couple formats to choose from; Avi for Windows (Divx+mp3), MOV for MAC (MPEG4+mp3), MP4 for ipod/PSP (MPEG4+AAC), 3GP for Mobile (MPEG4+AAC), and MP3(Audio only).
I choose 3GP for Mobile and it seems to work fine on my pearl. Only things ive noticed is that sometimes while watching the video in the Pearl, you cannot use any of the controls of the Media player/ exit the application before the video has finished....im thinking maybe the .3gp files take too many system resources of the pearl, but i dunno..... Try it and let me know your experience.