I searched around the Net for this information and didn't find any discussion, so here goes with the solution I found. Suppose you want to make a video podcast out of a [amazon:B0007LW23A|Keynote] presentation? The obvious step, to use the Export feature in Keynote, just results in overly large files. I want to take this step by step and explain what I did to get a reasonably sized file.

First, in Keynote I created my presentation. It's a normal presentation so don't sweat over this part.

Amazon Item: 

Apple iWork '06 (Mac DVD) [OLDER VERSION]