If it were chlorine, I think the bodies should have shown signs of burns. whomever the camera person was, unless in a fully encapsulated suit with air supply should have been effected as well. what I saw of the victims looked more like an organophosphate type poisoning which presents with sweating. tearing of the eyes, foaming of mouth, vomiting , urination and defecation. Could be wrong, but nothing looked right about that video.