The closest I’ve ever come to finding strange animals in my house I’ve been a dog and a cat.
We had a screen door on the front entrance, and after we got a puppy, it became a screen entrance with the doggie door. it worked fine for our dog, and there were a couple of other neighbourhood characters who it’s route well also. The neighbour two doors down had a little Shih Tzu that like to run away. For whatever reason, it always came over to our house, ran through the “doggie door” and made himself at home playing with her dog. Also, there was another time where random cat showed up in our house through the same door… We got it fixed after that.
Luckily, nothing like this happened: this family left their sliding glass door cracked open to let the cats in and out. Apparently, some bear cubs caught wind of the food and decided they should investigate. Imagine showing up to your living room to a bear eating all of your cat’s food. I’m surprised the man filming a video (aside from this terrible video skills) kept such a calm demeanour. With that said, the alternative is some pretty angry bear cubs… And very likely an angry mama bear. So, bravo, sir