I had heard that they added some kind of special mode just for this, where it's not a direct mirror, but a more traditional single-screen view (sans distortion) rather than the current double-barrel display, for people viewing in the room, and for folks on YouTube to be able to record a more "normal" view for their Rift videos.Trying to prepare a bit for my DK2 and I'm not really sure how to go about this mirroring thing on another monitor so outsiders can see what's going on.
I haven't been able to find anything specific about it, though, so I guess you could consider it rumor unless someone has a link (I wasn't able to find anything, but I haven't looked very hard).