How to upload videos on Ipod?

[Hazuki]

About an Ipod Video..

I tried to upload videos on to it, and it wouldn't work since I needed to convert them into MPEG-3.
I don't have a program for it, but Itunes can do this.

After converting the file, the quality was great, except there is no audio..

I did this twice, one with a PV and now with a CM, so it wouldn't take forever.
I really want to upload a few videos onto it, but I want to be able to hear it too!

Does anyone know why there's no audio?

Can anyone help me with this?