My daughter needs to see that one. (I enjoyed it too.) My daughter's cat didn't do that all the time, but since she's been ten or so she's done it a few times. The first time was when my friend brought in a tuna sandwich. I wasn't paying attention to what he had, or the cat. The cat sat right by me, staring up at me; but because I wasn't paying attention, I was just doing "whatever". Suddenly, she let out a couple of barks (just like in the video) to get my attention. That's when I realized she had been smelling the tuna sandwich "in the air" and was expecting some. It was the weirdest (and funniest thing) at the time.
I don't know how old the cat in the video is, but my theory (based on my own cats) is that they start to learn to be "creative" with their "voices" once they get to be, maybe, nine or ten or older. My own (late) cat (15) would actually mimic my tone and style of speech. A person would swear she was talking - only, of course, no actual words were being said.