The Microsoft Showcase website has lots of videos that you can view, email or embed in a webpage. There are over 800 videos including previews of Microsoft Office 2010.
For example, Health Tech Today with Dr. Bill Crounse is a monthly online series providing cutting-edge stories at the intersection of health and information technology. The show features informative interviews with some of the world's top health leaders; compelling health-related personal stories; and the latest technology and IT innovations. http://www.microsoft.com/video/en/us/details/4329633e-0333-49d7-852e-acdde14e42cc
Check it out: http://www.microsoft.com/video/en/us/default.aspx