IIS Media Pack 1.0 provides extensions that make delivering media from IIS simple, and cost-effective. IIS Media Pack protects media assets as it increases scalability by supporting more concurrent users per server. IIS supports all media file types, including WMV, FLV, and MP4, and provides a great way to use your existing Web infrastructure to deliver compelling rich media content to clients such as Microsoft Silverlight.
With IIS 7.0 and IIS Media Pack 1.0:
Sourcs: Keith Combs