This looks like the same issue as
UE-51465, but for ES31 (that was originally reported on ES2 and likely ES31 was not tested)
So far this has only been tested on Android. It didn't occur on Android ES2.
RESULT: The movie in the level has very high gamma
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-57319 in the post.