@Lister, I think you linked the wrong video?
Here's a very long (and visually
stunning!) review of the
M3P by Philip Bloom. At 14:50 he covers the "HDR" feature, and discussions he had about the dual native ISO sensor with DJI.
Some of the testing he does to try and see the noise step-down at the cross-over to the higher ISO are unimpressive. However, they're done in daylight, and I wonder if the advantages might be more prominent in low light.
Anyway, I find the
M3P video performance and quality, in the hands of a pro like Phillip Bloom, breathtaking.