people who download from p2p & rapidshare are used to getting things for free, I am betting it would only be a matter of time before your zip file gets unzipped and reuploaded with no password, or your password gets shared on a thousand blogs alongside the rapidshare link URL.

DRM would theoretically work better for this, people can download the file and unzip it but would have to authenticate against your .htpasswd file before the player allowed it to play the movie. But, of course, DRM is broken and can be easily defeated. DRM + p2p used to be profitable (one company had a huge p2p network and charged in the $10,000 range to get a DRM protected video online and featured) but now its not anymore.

I think you are getting to this idea about 2 years too late