How to protect a video with a password?

I want to deliver a video privately to a person online, allow them to play it once, and prevent them from replaying and saving it. How do I do this?

• I have a video I want someone to review, but want to keep it strictly private. Is there a 3rd party system out there that uses a password to protect videos, allow only one play, and prevents it from being saved? The only method I can think off the top of my head would be to set up a domain, with a Flash version of the video(no cache), using .htaccess for the password protection and to set the bandwidth allowed limit to be the size of the video. Any attempt to reply would throw an error of bandwidth exceeded. This seems like it would be a useful service, yet I couldn't find anything professional online. Video is 3 hours @ 720p resolution

• Answer:

  You can http://vimeo.com/ to share your private video without download option. for workaround you can give a time frame to watch the video then you can change video to private.  Its have a option to review too in pro version, I am not sure how that work.