Complex sentence: As night falls, Heather films herself apologizing to the co-producers of her project as well as their families and breaks down crying and hyperventilates, understanding that something terrible is hunting her and Mike, and will eventually take them.
Split into simpler sentences: As night falls, Heather films herself apologizing to the co-producers of her project as well as their families. She breaks down crying and hyperventilates, understanding that something terrible is hunting her and Mike, and will eventually take them.