Wonder where that was filmed? There seemed to be quite a mix of cats there, including several pedigrees.
Theres loads of different cat nip (or catmint) plants, they all have different degrees of the 'active ingredient'! Nepeta Cataria is the main one I think. Apparently cats won't destroy a catmint plant thats been grown from seed, but will destroy a plant thats been transplanted, i.e. one that you buy from the garden centre and plant in your garden.