Is there a license / royalty free DRM available for protecting and distributing content? [closed]

Is there a license / royalty free DRM available for protecting and distributing video content?

There are not many use cases where using DRM is a viable practice - there is no way to "enforce" trust and DRM only penalize people that should be trusted ... remember there is no way to protect data from the Analog Hole once you decided to share them with an untrusted party.

Anyway you can always have a look at the DReaM project which is not very active these days (plus, its website does not seem responsive, for me it timeouts 4 times out of 5). You may find some more recent information at openmediacommons.org.

A freeware DRM scheme won't work in Microsoft's Windows Media Player.
So if you want people to use your content with this player, you need to use Microsoft's own DRM.

You might have a look at Microsoft's Windows Media Rights Manager and its SDK.
Microsoft's Media downloads are here.

The doc give the impression that the SDK is free, but I'm sure that you'll pay something to Microsoft somewhere along the way.