I am creating a host website where users can upload their YouTube videos, which only users with adequate permissions can view. I want my site to exclusively control the disclosure of videos, their metadata and even their URLs to the public. I want those videos to be invisible on YouTube, and hidden from Google spiders as well.
Unfortunately, I discovered that, with YouTube, a video can be shared freely by simply knowing its URL, which is easily obtained by studying the page source in the browser.
Can this backdoor be circumvented? Does YouTube have a feature that allows a video to be unlisted and locked, except if 'authorized' by another site? If not, is there another video hosting site that does?