Sorry the video has been taken down.
I've updated the REASEO site and the keyword research section is complete if you want to check it out.
It covers 3 main points of keyword research. 1) Keyword Brainstorming - which pretty much self explanatory, 2) Keyword research with Google's free Keyword Tool and 3) Keyword Grouping - This is where you put your keywords in groups so you don't end up trying to optimize one page for 30 different keywords.
If you like it