Alex, fuck the resources! Lets figure this out and we'll see what happens next and if it works we will optimize.
The problems here:
a. This has to be easy to integrate
b. It should allow regular surfers to open the file and to disable access for hotlink redirects
c. If possible, it should open directly in the player the surfer is using
The best thing that cames to my mind is to log visits on every page and check logs when it the times come to send the video. The links should point to mod_rewrite accessed script, that way it will look as a regular URL and none of the LLs would mention it and make a problem out of it as it happened a couple of times with my sites. And I think that's it the simpliest way to explain this. Let me know if you want me to go further
Andrew