Proxy Media Server installs a handler that allows the users to download media through a proxy instead of allowing them download the file directly.
e.g.
www.website.com/media/1120/someimage.png
With this package can be:
www.website.com/MediaServer.ashx?id=1120
To use, simply do:
<a href="/MediaServer.ashx?id={@mediaId}">Download file</a>
This would allow the user to download the file without necessarily making the direct path to the file obvious.