http://www.gizmag.com/magic-lantern-...00d-60d/20909/
"To record HDR video, Magic Lantern causes the camera to record each alternate video frame with a different ISO setting. Presumably you can set your "dark" and "light" exposure settings manually.
In post production, the frames' exposures are blended together so that the darker areas are taken from the higher ISO shot, and the brighter areas from the lower ISO frame. Each frame of the video becomes a 2-exposure HDR image.
Of course, motion in the frame provides a bit of a problem, as the two shots won't quite match up. For this, there's some sort of interpolation algorithm used to get the best image possible. From the demo video it looks like there's a few motion glitches, but the scenes still look and feel usable."
This is really really really clever and a big step closer to affordable professional HDR videography.