Say you post a movie clip on your forum, but then someone else decides to paste that link on their forum, now their downloading off your site is there anyway to prevent such a thing? like if they wanted to download it, they would have to be on my website only?
According msdn knowledge base (I read a while back when I tried to prevent this), they said webserver won't check the referer on media files. In another word, some site asks for those files, your server will fetch those files.