How to get viral marketing working

This is my reply to my post on MarketingMag regarding how to optimise video for seo and how to make the video work for you and not just look pretty.The most interesting thing about most of these viral videos, is that they were mostly spread through what we feel is old media, tv/radion, word of mouth, emails, blogs and newspapers.  They didnt have true scale using medium such as twitter, while this played a part they did not depend on this new technology to spread.