Im in the process of developing a content based website in which people will be able to upload movies(which are then converted to flv format and displayed in a flash based player.) In order to protect the submitted content I would like to setup an offsite folder for the videos and create symbolic/hard links to the files only when in use.

My question:
Is there a way to create a file, symbolic link, hard link... that destroys itself after it has been used?

(In other words I want the script to create this file then once the player initiates the download I want all further attempts to download the video to be rejected. In other words the file can only be accessed via the given video script.)

Site information that might be important:
PHP 4
MySQL
ffmpeg is used to convert the submitted video
Debian GNU/Linux
I do NOT have root access on the server(I was able to get ffmpeg to install to a local directory)