This video is not available in English (UK). The video is available in English (US).
Windows Store app - Getting Started with Authentication in Windows Azure Mobile Services
Windows Azure Mobile Services enables authentication scenarios with popular social identity providers such as Microsoft Account, Twitter, Facebook and Google. In this video Nick Harris demonstrates how you can authenticate users of your Windows Store apps using their Microsoft Account and then how you can restrict access to insert/update/read and delete permissions on the tables within your Mobile service to authenticated users.