Flutterby™! : A Graphics Question for Flutterbarians

I want to capture some computer screen output - that is record some things going on on the screen. I found this great program called Camtasia which works well. It allows easy recording, editing of the file, etc, and will output in AVI.

But I am a neophite at this. How do I put this on to a VHS or Beta format for displaying on a TV? What is the best screen resolution, size etc. for this? Is AVI what I really want for this? Is there a better choice of tools for this?

Ah yes, in Mayberry we are always behind the technology, can anyone help a dual citizen - that is Flutterbarian/Mayberrian?

Thanks,

Ziffle