WordPress.tv
is created by the developers of WordPress, Automattic. Visit their excellent site for a huge range of WordPress training videos.
Set-Up Videos
The WordPress.com dashboard – introduction
Adding & managing categories after the fact
Adding a widget to your sidebar
Creating a static front page for your blog
Adding an “About Me” (or any other static) page
Add a PayPal button to your self-hosted WordPress blog
Create an eCommerce Website with WordPress in under 5 minutes
Publishing Videos
Publishing your post at a later date
Adding categories and tags to your posts
Changing attribution for a post
Setting your posts – or entire blog – to private
Design Videos
Building The Ultimate Website Content Map, Part One
Scalable WordPress Navigation Using Sort Order
CSS-Tricks: Designing for WordPress Part One of Three
Themes Videos
David Gadarian: how to designing your own theme
Previewing and activating themes
Anatomy of a WordPress Theme – exploring the files behind your theme