1. Main theme We know YouTube is sending copyright claims when they identify the main theme of Empyrion, because this is a licensed track and we can not prevent YouTube doing so. If you want to monetize your video, please tune down the main theme.
2. Ambient Sounds (like wind) We heard about claims that were issued because of some sounds in the game, like the wind.
IF YOU GET TO KNOW OF A COPYRIGHT CLAIMS as described in (2.) PLEASE GET IN TOUCH WITH ME via Mail or point the youtuber you are following/watching towards this thread or this email adress.