Here is a collection of public video’s by various people about group policy:

TechEd Online

• Group Policy Changes for Windows 7 and Windows Server 2008 R2 [CLI312]
• Group Policy’s in Windows Server 2008 R2 & Windows 7 [TTK157]
• Saving Power Using the Power of Group Policy Preferences [TTK120]
• What’s new in Group Policy in Server R2 [TTK62]
• MDOP: Advanced Group Policy Management and the Larger GP System

TechEd Australia 2009

• Using the Power of Group Policy Preferences to Eliminate logon scripts and take control of your Environment [CLI308]
• Windows Server 2008 R2 Group Policy Changes [SVR310]

TechNet Edge

• Jeremy Moskowitz: GP troubleshooting
• What’s New in Group Policy?
• Using Group Policy to set default printers in Windows 7
• What’s new in Group Policy for Windows 7?
• Power Management and Troubleshooting Group Policy
• Windows Server 2008 R2 Quick Look #5 – Group Policy Management
• Jeremy Moskowitz on the Microsoft Deployment Toolkit