we are looking into building a commercial vod service and I'm doing research on the subject.

We need the video to be protected with DRM so users cant rip/copy (i realise its mostly useless but the lawyers demand it from us) and the server solution to be scalable and able to distrubute content in hd to a high number of clients.

Besides, we would need to be able to develop a player integrated with the payment system, so users that havent bought access would for example only see the first 30 seconds of video and then have the playback interrupted, or only be able to watch video for 72h after payment.

Also it would be nice if we could distribute video to mobile platforms like android/wp8/ios but thats not a priority at the moment.

I have zero experience on that topic so I would greatly appreciate any feedback or giving me stuff to read about like protocols or key phrases i should know.

Thanks