This document provides an overview of Windows Azure Media Services (WAMS). It discusses the growing trends in online video consumption and the challenges of building platforms like YouTube at scale. WAMS aims to simplify hosting and streaming video online through its features like encoding, packaging, playback across devices, DRM, and APIs. The document outlines the WAMS architecture and workflow, provides a demo, and shares how the London 2012 Olympics leveraged WAMS as a case study before concluding on its cross-platform capabilities.