Indexing with google using Plugin WordPress SEO by Yoast

This is my site http://www.seoliverpoolwirral.com/
I want to index it with Google using your plugin.I do not want to change SEO Plugins.
This YouTube video shows you how to Verify your with WordPress www but problem is it is a different plugin on the video then yours
http://www.youtube.com/watch?v=B-JEvpTLVJ0

Where or how do I put the Google code in your plugin to get the site index and up and running on Google.

http://wordpress.org/extend/plugins/wordpress-seo/