I saw the Exposure Sim. bug. shooting video, tried raw with all else disabled except could not kill Expo. Sim.
F-Up question: Is Dual ISO in video working?
I recall getting lots of horiz. lines in the past did not see any (picture did has some variation in tones)? I tried 400/1600 in MLVRAW and was able to get a decent pic (I was shooting 2K resolutions 24fps, @2.39,1/160s using f1.8 glass). However I did not check against 400 ISO (single iso) which has clean shadows & no hot pixels, but it certainly was not noisy in shadows like ISO 1600 (single iso).
I used the Mystic Dual ISO DNG converter and CC in AE. No hot pixels or noisy shadows, could it be that there is a way to use ISO1600 in 70D raw video?
It looks like Dual ISO video is not working either crop/no-crop mode. I tried Mystic, convert MLV, and then convert Dual ISO. Yuck! result.