This is my first test with the new great HDR ability of ML. I edited it in Sony Vegas.
I want to share my workflow for those that use Vegas and asked about it.
To separate the dark and light frames we have two copies of the clip in separated tracks, remove the first frame from one of them. Go to properties; disable resample, and put the playback rate in 2. You have now one dark video and one light. Position the dark one on top, duplicate it on top of it and go to event FX.
Add: Black and White =1
Brightness and contrast (contrast =1)
Gaussian Blur =0.005
Mask generator (graduate output low and high very near, about the center).
Make compositing child.
Graduate Level % of this track at will.
Render it. It is at double the speed. You can now use Twixtor to put it back to normal speed (50%). Always disable resample, and I recomend to use nearest for frame interpolation in Twixtor to render.
Do the grade and adjustments at will.
Based in my experience HDR is not for abuse of it. But it helps very well to solve situations when some light is clipping, and you need to fill the white. You can get something natural and lovely.