In the Windows Media Playlist Editor, expand the playlist, and
then expand the smil element to show the elements in the
playlist.
Click the element after which you want to add an
advertisement.
On the toolbar, click the Add element arrow, and then
click Advertisement.
The Add Advertisement dialog box
appears.
Type the location of the advertisement you want to add.
Click OK to add the selected advertisement to the
playlist.
Notes
The Windows Media Playlist Editor is only
available in the Windows Media Services snap-in.
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 or later is 5 seconds. The minimum supported
content length for previous versions of Windows Media Player is 30
seconds.