"Cat Opens Freezer and Gets Fish Fillets" and

This is not exactly a formal short film, just a short, “Cat Opens Freezer and Gets Fish Filets” (2011), from dolceluxy

The cat, sitting on a kitchen counter top, figures out how to open a freezing component of a typical refrigerator and get the fish fillets to fall to the floor.

I presume he understands that the fillets will thaw in warm air.

Here’s another video, where a house in a home in Germany opens five doors to let himself out.  He would not understand the concept of a key-locked door. 

  

When I lived in Dallas (1979), a stray cat would come and try to open the door to my apartment.  He recognized the sound of my car as I parked and would run to the right apartment on a second floor landing. 

  

Carnivores generally understand spatial relationships and that food can be behind something and be hidden from view (but not from smell).  That’s why campers have to keep food out of tents to keep it from bears.  As a mammal, if you hunt for a living, you have to be able to solve problems and have a point of view, which is why (beyond primates and cetaceans) carnivores generally have some of the intellectual aspects of people.  Cats are particularly aware of the possibility of beneficial relationships with other creatures, rather than eating them.