If they are active, then it is probably just their digestion/ guts gearing up for life. Cocci will have red tinge in the liquid part of the poo as well. It does look like a normal poo, but the upclose and the red light are throwing things off. Once again, look at how your chicks are acting, if they look happy and content, they are fine.
I was sort of preparing myself that they might have died overnight, but they seem to be acting normal, doing their chick thing. I guess I'll try not to worry too much for now!