Good vid, but I followed the directions to edit the master.default page and it broke my SharePoint instance.  Then I find some pre-release documentation (  that states you shouldn't do that "Do not edit the default.master file directly in the <%System Drive%>Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\TEMPLATE\GLOBAL\ folder.".  So now my installation is hosed, and I'm wondering why yours didn't break.