Sort of like the highest level of nothing in the video. Not even the possibility of something appearing.
No mind, no body, nothing else. End of cognition means end of even ways of describing parinibbāna. Hence that one sutta where after the 6 sense bases ends without remainder, no profileration can be done. The important thing to note is end without remainder. No mind to see parinibbāna after death of arahants. But while alive, arahants can perceive nibbāna.