so the video is about how to knuckle a soccer ball.
first of all, you need to kick the soccer ball with your foot. Do not kick the ball with the point of your foot, because you can not control the direction witch the ball is going to go. it is usually off target if you kick it with the point of your foot.
what you need to do is kick the soccer ball with the side of your foot, so it has a bigger and larger surface that touches the soccer ball and it is easier for you to control the ball.
You also need to kick the ball straight, do not curve your body, or it will changes the direction.
you need also to control your power while hitting the ball so it can go in the net.