For an animal which is known as aloof and uncaring, cats sure do want a whole lot of attention sometimes. And being cats - persistent and unrelenting - the will not stop until they get the attention that they want no matter what is going to come in their way.
The cat in this video seems to be attempting to cross the line by interrupting its owner over and over and over again. For the owner, it must be one of the most frustrating things, because of course you want to give your cat attention, but also, you do have to get some work done. For us though, it's adorable and too amusing to not watch.