You can add audio and video files located on your hard
disk on your computer.
Do one of the following:
Select Insert
> Enclosure > From My Computer.
Click on the Enclosures button in the toolbar and select
From My Computer from the pop-up menu.
The Select
Enclosure dialog box appears.
Navigate to and select the audio or video file to insert,
and then click Open.
The audio or video file now appears in
the Enclosure workspace in the draft. The file does not play in
the draft; you must publish your draft to play the file.