Blocking “save as source” option with Quicktime streaming

Hi – first time posting here –

I work at a university library, and we’re streaming a few hundred videos from our XServe (10.5.8) server. We just realized that if a user has Quicktime Pro on their computer, they have a dropdown menu with options to “save as source” or “save as quicktime movie” when viewing the video in their browser. Is there any way to configure the server so these options are not available? I know they only save reference files, not the full video, but we’d like to get rid of this option if possible just for copyright reasons.

I know if we embed the videos on an html page we can turn on “kiosk” mode but I’d rather not have to embed them.

thanks,

Emily