What kind of video extansion for behold!?

I have been using format factory and putting mp4 on mine with no problem.

As long as it's in mp4 format and the correct dimensions, theres no problem

All the videos on my 4GB memory card are in 3GPP format. Will they play on the Behold? They were recorded when the memory card was in my ROKR E8. When I put the 4GB card in my Behold will the play?

How do I convert files? Do i need to download a file converter onto my pc?

I tried to play both mp4 and 3gp on my Behold. They works fine. Just make sure it's not higher than 320x240 resolution.

I use Any Video Converter 2.67
It's free and they can download videos from youtube / metacafe and such for you.

Ive been using this program: http://mediacoder.sourceforge.net/mirrors.htm?file=MediaCoder-3GP-0.6.2.4205.exe
under the generic mobile phone window I use these settings:
Very High Quality
MP4
Resolution 320x240
25 FPS
Then under the mediacoder window under the audio tab I select 20 db under gain to make the sound a little louder
Then under transcode at the top select  cropping option and click manual cropping. Under mode select auto detect, then click done under actions.

With these settings you crop out the black bars to make a larger picture on the beholds screen. The video does not have zoom option with these settings nor does it quite cover the entire screen, but the picture is crystal clear and dosnt get bad like using the zoom feature.

it eliminates the horizontal black bars using the cropping without loss of quality you can see in my picture there are no horizontal bars