Recorded from the live ISS stream. The video is not sped-up and not time-lapsed.
May be a UFO or other unknown object or it is the Sun ( combination of the suns/ISS/earths orbital trajectories ) peering from the backside of the ISS. The strange patterns are a combination of lens flare and aperture blades, 6 of them, that’s what causes the hexagonal shape).
What do you think?