MSDN Nuggets and ASP.NET How Do I Video Series
In addition to these set's of videos, which concentrate on ASP.NET 2.0, there are a great bunch of short "nuggets" that Microsoft UK put together.
When I was learning Workflow, Mike Taulty's nuggets (that doesn't sound right) really helped me get through the basics and into the advanced features too, like compensations, transactions, etc.
The nuggets are short ~10 minute videos that you can see in action...
http://www.microsoft.com/uk/msdn/nuggets/
Workflow Nuggets (Screencasts on NetFx3.com)
ASP.NET How Do I Video Series