I’m so annoyed I missed the beginning of this, since the camera wasn’t in reach: Angel had Cory pinned and was washing him vigorously, much to his indignation. I think that’s a lot of why he has such a fierce at the beginning of the video. Angel is very gentle with the babycats, she’ll bat them around but doesn’t use claws or bite hard, and at most she’ll get up and leave if they get too rough.
As for this one, there are certainly times Cory has minimal response to visual stimuli (a rather blank stare) but at other times, he seems to be able to see at least somewhat. There’s a key here somewhere, I’m sure of it — colour, texture, lighting, movement, direction of movement, who knows? I’m going to watch for it. Once he has contact with his mouse, vision becomes irrelevant and impossible to judge.