We have done similar solutions in the past and we also have content protection technologies to protect downloaded DVD video. A possible solution is to help you take your DVD video, provide you our technology to protect it (against piracy like copying, ripping, file sharing, torrenting etc), then provide you an app with your branding which plays the protected content on Windows PCs. Zip everything together into a downloadable zip, which you can provide as a download from your website. Please let us know if this proposed solution works or any tweaks are necessary. Then we can discuss pricing and implementation.