You can find a series of new step by step videos for both Advance Group Policy Management (AGPM) and the Diagnostics and Recovery Toolset (DaRT) on the MDOP video page. If your new to AGPM or DaRT, or just looking to get up to speed on a particular feature check them out. Microsoft have broken them down into small, feature by feature bites so you can either watch them all or just consume the ones that you want when you want to.
Create a Virtual Application Using the App-V Sequencer: This video walk you through different files that make up a virtual application package and teach you how to: Run App-V 4.6 Sequencer to sequence an app; Create file type associations and shortcuts; Configure a custom app package:
More Video: MDOP Videos Page