Unless one insists that cats hallucinate, it's hard not to admit, based on numerous accounts and videos, that they can see moving entities that we can't see. In the last video, you have two cats turning their heads and looking at something in perfect sync with each other, proving that what they are seeing is really there and moving around. What must they be seeing? The entities seem to move around on the ceiling and on the upper walls, prompting some cats to try to attack them. See what you think.
https://www.youtube.com/watch?v=_9-DQNM7Fwc
https://www.youtube.com/watch?v=_9-DQNM7Fwc