Hmm.. perhaps htaccess could help you..
By passing the request_uri as a query_string to a custom script which then parses and updates the html before serving it to the browser.. arghh
Stop making me think dammit
Besides something fancy schmancy would get declined from listing anyway.
Dont show the cumshot, that will help. Show before and maybe after, but not during, lol. Your surfers might be getting off on your movies.
If you're allowed, try branding the movies with your own url. That way even when they save them to their desktop to watch later, you still have advertising.