This has been a thing for a while in the broadcast world. There was a piece of gear that could be used to create a report that could be generated to show that the content did not have the strobing that cold cause issues. It's been a long time since I've been involved to know the current specs, but I know platforms like iTunes, Netflix, et al wanted this as well. Disney was a stickler for it since it was a lot of animation and kid oriented, but I might be confusing my time with their broadcast tapes vs streaming masters. As far as I'm aware, if the content did not pass this test, it was sent back for editing vs just adjust some settings on playback. so this is interesting that it's a realtime levels adjustment