Many "visual how tos" video series are added to the online documents of Windows SharePoint Services 3.0. Each "visual how to" is a special introduction to a specific topic.
Visual how TOS
Activating auditing programmatically for a single document library in Windows SharePoint Services 3.0
Activating auditing programmatically for a site collection in Windows SharePoint Services 3.0
Mining intelliisense with caml files when developing for Sharepoint 2007
Create a custom httphandler in a Windows SharePoint Services 3.0
Creating a feature for an entry control block item in Windows SharePoint Services 3.0
Creating a feature for the site actions menu in Windows SharePoint Services 3.0
Creating a solution package in Windows SharePoint Services 3.0
Creating a Visual Studio project for Windows SharePoint Services 3.0
Creating an application page in Windows SharePoint Services 3.0
Displaying data by using the spgridview control in Windows SharePoint Services 3.0
Reading entries from the Audit Log in Windows SharePoint Services 3.0
Reading listid and Itemid from an application page in Windows SharePoint Services 3.0
Running commands with elevated privileges in Windows SharePoint Services 3.0
Writing custom entries to the audit log in Windows SharePoint Services 3.0
Sunmoonfire translated some "visual how tos" series on his blogArticle.