I got my rift two days ago and finally set everything up: MacBook Air 13", Displayport -> HDMI adapter.
Set my MacBook screen to mirroring with 1280x800.
As I have perfect vision, I sticked to the eye cup A.
I tried running this video on youtube:http://www.youtube.com/watch?v=2dV73lC4wlA
But I get double vision, the images slightly overlap, so in this video, I see the castle twice, next to each other.
With the Tuscany Demo I have vision only on one eye, the other is white.
I think I saw some other posts about that, so I'll dig deeper there. But I wanted to get the video working first, as there seems to be something wrong with the setup already.