Sony ILCE-7CM2 Help Manual page 203

You can adjust the exposure compensation value within the range of -2.0 EV to +2.0 EV for movies.
Note
You cannot perform the exposure compensation in the following shooting modes:
[Intelligent Auto]
[Scene Selection]
When using [Manual Exposure], you can perform the exposure compensation only when [
If you shoot a subject in extremely bright or dark conditions, or when you use the flash, you may not be able to get a satisfactory
effect.
Related Topic
Exposure step (still image/movie)
Exp.comp.set
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ISO] is set to [ISO AUTO].
TP1001150393