You only have 10 moves to complete level 172 which is not a lot. To clear the level you need to get 10,000 points and you need to clear the jelly, which is under a five move bomb at the bottom of the screen. Blocking your path to that bomb is two rows of four-hit blockers. Your only chance is to create two or three striped candies above the bomb to break through the blockers and take care of it. That is unless you get lucky like in the video and get a colour bomb on your first or second move. There are only four colours of candy so that is not as unrealistic as you might think.