Does anyone here know what both the song and video for Kyomu No Naka De No Yuugi are about? I've just watched the video and I've taken a liking to it now, and I've read the lyrics and I can't really make much sense out of it. apparently the translation for its name is "The Game of Nothingness" so I kinda saw the video as a twisted and dark version of hide and seek, but the girl seems quite terrified in a way. What do you guys think?

I think you are somewhat accurate. That's what i would guess. Maybe the background choir lyrics can be translated? idk XD