This is a great example of well executed animation. I have use this as reference in my classes to show a few things.
-A great understanding of cat movement
-Applying that knowledge to create a believable performance
-Keeping the feeling of a cat and applying human movements to build entertainment
-Great posing and expressions
These things are key to making great "Animation"... just taking from life is boring, but this example shows you how you can observe life and make something amazing.