>>15935896That mouse has a parasite in it's brain that wants to get into the cat, which is why the mouse is not running away from the cat and is trying to be killed and eaten by it. The parasite has essentially hijacked the mouse and is piloting it to it's death.
Any time you see these "cutesy" videos of mice being unusually friendly to cats and not running for their lives from them as their natural instinct is, that's what's going on.