I think that nothing comes to you without you actually working and trying.
I think in the video they showed very common situation. Because better kids did their work obviously better then other kids.
But why other kids can`t be the same educated?
I really believe that if they worked hard and studied they would catch up to the same level of supirior kids. Because we all are equel, sometimes somebody is better in math then we are but we are better in writting. So this way we are all equel. That`s why I think only hard work can lead person to his dream. You can`t just rely on what people around you say.
If they say that you cant do something try harder and you will prove that you are the person that is hardworking and succesful.