You're wrong

It's coming to 6D when 6D users become less ignorant

HDR video is used at 50fps/60fps, so one ends up with a dark frame followed by a light frame, which one can then blend together into a 25fps/30fps HDR video.
h.264 is only 8bit, so no you can't fake HDR it. Particularly works well when shot in dark indoors while one still wants to capture the bright outdoors through the window.
If you have a look at some of the HDR videos in the ML Cinema you will see just how cromulent the effect can be.
One sets the exposure correctly to catch the bright areas, then adjusts the exposure using the iso only for the dark areas to get two perfectly exposed areas which can be then mashed together.
The added features are there to embiggen ML. Find what works best for you... but i guarantee your bizarre technique won't churn as good as results as 'legitimate' HDR.
And I'm unsure as to why you question is posed in such an attack when it's something that doesn't have to be used if you don't want to.