Update overview.md

Author: MutemwaRMasheke

articles/governance/machine-configuration/how-to/develop-custom-package/overview.md

@@ -26,6 +26,8 @@ both Windows and Linux. The DSC configuration defines the condition that the mac
 >
 > Don't use secrets or confidential information in custom content packages.
 
+
+
 Use the following steps to develop your own configuration for managing the state of an Azure or
 non-Azure machine.
 
@@ -36,6 +38,11 @@ non-Azure machine.
 1. [Provide access to a package][07]
 1. [Sign the package artifact][08]
 
+The following video provides a step by step guide on how to author a custom machine configuration policy using
+the [GuestConfiguration PowerShell module][09].
+
+[!VIDEO https://youtu.be/75MTIftSEfk]
+
 <!-- Link reference definitions -->
 [01]: ../../overview.md
 [02]: /powershell/dsc/overview
@@ -45,3 +52,4 @@ non-Azure machine.
 [06]: ./4-publish-package.md
 [07]: ./5-access-package.md
 [08]: ./6-sign-package.md
+[09]: https://www.powershellgallery.com/packages/GuestConfiguration/4.6.0