Hi Cindy!
You will be able to access it online indefinitely. Also, there is a link to the video bundle from the "Learn SEO" tab in the main navigation. Of course it seems to not show up if you go there from within Q&A but if you go to the homepage, then "Learn SEO" there is a link to: http://www.seomoz.org/mozcon-videos.
Hope this helps!
Jen