Space.
Sorry to disappoint but the sequence is sunlight reflecting from their jettisoned poop. They expel the poop into space in small units so it will hopefully degrade faster. NASA is covering up orbital pollution! The ISS crew is literally ****itting on San Jose, they don't want you to know!
Swamp Gas?
Edit*
Dang!
It's the solar panels.They are black and don't reflect light, hence why you can't really see them in that video.[/img]
Space.
What a stupid thing to say... it's clearly the space aliens trying their besterest not to be detected by showing up in just about every video NASA has ever filmed in orbit.