You can also set up a camera in front of your monitor and just record the whole thing. DRM has never been functional. Best it can do, is deflect the average user from just quickly sending it to his friend. But anyone with any motivation can easily get around it.
This is the most important missing piece, are their bugs for this?
Until we have html/dom textures in vr I just don't see webvr being very successful.
Just like the headset isolates you from the room, the lack of normal web content in vr/mr is very isolating.