HDR video, you can disable it in ios settings
Discussion
I searched but don’t see anything other to record or view in photos (already disabled)
It's not that
really? what else would it be
I don't know. Just listing the facts:
It does not happen to all videos or photos.
It cannot be turned off.
It does not show is screen shot or screen record.
There is no settings for it.
It's really weird and annoying.

