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 (http://msdn2.microsoft.com/en-us/ms476046.aspx)
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.