Adding links to on demand videos

Author: jmprieur

README.md

@@ -18,6 +18,8 @@ endpoint: AAD V2
 You expose a Web API and you want to protect it so that only authenticated user can access it. You want to enable authenticated users with both work and school accounts
 or Microsoft personal accounts (formerly live account) to use your Web API.
 
+An on demand video was created for the Build 2018 event, featuring this scenario and this sample. See the video [Building Web API Solutions with Authentication](https://channel9.msdn.com/Events/Build/2018/THR5000), and the associated [PowerPoint deck](http://video.ch9.ms/sessions/c1f9c808-82bc-480a-a930-b340097f6cc1/BuildWebAPISolutionswithAuthentication.pptx)
+
 ### Overview
 
 This sample presents a Web API running on ASP.NET Core 2.0, protected by Azure AD OAuth Bearer Authentication. The Web API is exercised by a .NET Desktop WPF application.