IIRC each streaming service has a different set of acceptance criteria. I haven't read about color grading in this regard, but Netflix, Disney etc. do control t

IIRC each streaming service has a different set of acceptance criteria. I haven't read about color grading in this regard, but Netflix, Disney etc. do control things like audio levels to ensure that the experience is even across their different media titles -- having to crank up the volume on one title, only to be blown away when starting another one is a poor user experience. Requirements around mean audio level can have non-trivial impacts on the experience of a film -- ones with a lot of quiet/loud contrast may be affected differently from ones with less peaky audio tracks. I hadn't thought about it before, but it makes sense that this would apply to the visual aspect as well.