To stream a Windows Media file from an on-demand publishing point
In the console tree, click the on-demand publishing point from which you want to stream content.
In the details pane, click the Source tab.
In the Content Source area, be sure the Location path is the same as the location of the Windows Media file you want to stream.
If it is not, click Change and type the path to the content, or click Browse to locate the file.
Notes
If you choose, you can move the Windows Media file to the directory specified in the Location path instead.
Content streamed by Windows Media Services must meet the minimum supported content length of the player to ensure reliable playback. The minimum supported content length for Windows Media Player 9 Series is 5 seconds. The minimum supported content length for previous versions of Windows Media Player is 30 seconds.