Video help. Cant stop continous play of video..

I am in a diar need of help....I am working on a site for a client and have a video that will go on my home page.
I have it where it starts play right as you go to the home page then stops at the end. When I browse the site and come back to the home page, it plays all over again. The client wants this movie to only play once when the person goes to it the first time. Is there a way to make it reconzie a persons IP address so that it only plays once upon entering. I don't know if I am reaching at straws...but any help would be great.