Drupal and Amazon S3 for Quicktime video

Hi, thank you for any help you can give me with this. I really appreciate everyones hard work.

We have a Drupal site hosted on Godaddy. I need to have quicktime videos hosted on S3.

But I only want registered lgged in members of my Drupal site to be able to access the quicktimes.

I don't want just anyone to be able to type the direct URL into the browser.

Is there a way to authorize my whole Drupal site so only calls from it would be accepted by S3?