Pew Internet Study just released a report today stating that first the amount of people viewing online videos have doubled since 2x and also that men spend more time on YouTube than women.
To see the report: http://www.pewinternet.org/Reports/2009/13--The-Audience-for-Online-VideoSharing-Sites-Shoots-Up.aspx
So knowing this insight, let say you are launching a new game targeted for men or service for men. It would be a good idea to create a video and upload it on YouTube with the proper social media promotion. What do you think?