Brian explains moving laterally. You will see advanced skaters executing moving side to side, this is a great warm up or stroking exercise. Brian then emphasizes not leaning into the circle, exercising a bit of a twist and having weight on the undercut foot. simple pressing on that foot creates speed.
Now see both Juniors and seniors execute this exercise at the same time. Then you will hear Brian wrap up the effort and time to put the attention to these details. This is the ultimate goal. You must always be aware of this goal..