Below you will find 5 videos I think would be useful for css beginners. There are a wealth of of other videos as well at the major video sites such as Vimeo and Youtube.
Basic Css Tutorial
This 20 minute video goes over some of the basics but very important aspects of css.
Firebug is a great way to practice CSS on live websites around the web. Its free and you only need to have Firefox web browser to use it. If your looking to experiment with a great variety of websites using different CSS setups this is the plugin I would most recommend.
Css Dropdown Menu
Shane shows you how to build a css dropdown menu from scratch.
Css Splash Page
Adam shows you how to create a css custom page template for a splash page.
Font Family Explained
This short video explains what you need to know about css fonts