Those cats don't care for the cookie. What is wrong with it? Why don't like the cookie?
Do you wonder if there will be a sudden tragic turn of events once the singer eats that cookie? Like if it's poison or if he chokes on a chocolate chip? It would be a tragedy if the singer choked on that cookie after singing about it so loudly that the cats didn't bother to warn him before he left.
Perhaps it wasn't a failure. Perhaps they WANTED that freezer door open. Freezers typically contain ice cream. Cats love ice cream. And what are cookies without ice cream? This explains the cats' strange apathy toward to cookies, even though the musical subtext clearly indicates a yearning for cookies.
Therefore, the cats were waiting on the cookies until they could manage to craftily open the freezer door without the aid of opposable thumbs. Furthermore, they were engaging in delayed gratification, considered by many psychologists to be a hallmark of human-level intellect.
There, I just solved the riddle of the video AND uncovered the incipient Cat Revolution. Soon, they will be able to operate can openers.