Using a Database to distribute a media file

I've been assigned a project to distribute a video in a windows media
file format. Security is essential with this data, so we don't want it
to get outside the company.
What steps are necessary to set the file parameters to prevent
downloading/saving of said file?
(I realize that this is more of a Win question, but may or may not
involve some LS work. Let's see what the responses are. Thanks.)
The file may (undecided as yet) be accessed by either Notes or IE.

Thanks,

Collin
KC8TKA