Encrypted Media Extensions - Wikipedia, the free encyclopedia
Encrypted streaming only ** if the can do this with webm fine same end result ...
Netflix is using this but it's not ready yet for general use -- it is only working on Google Chrome now. This is the DRM schema that Netflix is using now and my guess is that Youtube will be next -- they will encode video uploads like this and they will be DRM protected from further download and sharing.
Once this is fully implemented users will only expect encrypted streaming -- adapt or die

see:
https://github.com/Netflix/msl/blob/master/README.md
No more stolen content