Check out these videos on MSDN. Here's the landing page for VSTS videos.

Here are the testing related videos:

How Do I: Create a Data-Bound Web Test?

How Do I: Use .NET Code to Customize Coded Web Tests?

How Do I: Use the Visual Studio Team System Test Load Agent?

How Do I: Manage Test Results and Test Results Files?

How Do I: Data-Bind a Unit Test?

How Do I: Easily Bind Data to .NET Unit Tests?

- Note this video does not talk about managing load test results.

DB Pro (Visual Studio Team System for Database Professionals) test videos:

How Do I: Generate Test Data using Visual Studio Team System Database Edition?

How Do I: Use the Checksum and ExpectedSchema Database Test Conditions?

Ed.