I've tried for 3 days to convert a video to play on my 8130.
I tried using Nero Recode, Seabyrd Technologies converter, & Aimersofts blackberry converter. All of them make an avi file that plays fine on my computer.
After converting, then copying to my videos folder on my card, when trying to play them, all I get is "Unable to play content".
I use Mediacell Blackberry Video Converter. It's free and converts an .avi file into a .mp4 file. Conversion takes a 730mb file and reduces it to a 170mb file. You can also specify which Blackberry you have so it optimizes the size for your application.