What is the difference between Silverlight Streaming and other video sharing services?
Silverlight Streaming is focused on developers who want to build their own media-rich applications or Web sites. Unlike other video sharing services, there are no third-party branding requirements for the use of Silverlight Streaming, and the developer is in full control over their rich media experience within the context of their Web site. This includes items that are not presently supported on other sites such as 16:9 aspect ratio video, DVD-quality video, stereo audio, and customized UI (XAML).