That video is probably geared toward the professional player instead of the highschool player. For a highschool player to just catch and not even pick up his right foot is ridiculous. Do you know how strong your arm has to be to make that throw. For a highschool player the best way to teach footwork is to draw an X in the dirt right below your chin and step there with your right foot. This way your momentum will be going towards 2nd base and you can get your legs into the throw.