I have came across bunch of short videos for customer talk about SharePoint capabilities and how SharePoint affected their productivity.
Microsoft SharePoint - Secure Collaboration Solution Overview
Microsoft SharePoint - For IT Professionals
Microsoft SharePoint For Professional developers
Microsoft SharePoint - ECM Increase Productivity and Reduce Risk
Microsoft SharePoint - Social Computing Allows Users to Connect, Innovate and Share
Microsoft SharePoint - Productivity with Enterprise Search from Microsoft
Microsoft SharePoint - Improving Business Insight with SharePoint 2010
Microsoft SharePoint - Internal Digital Marketing with SharePoint