The youtube video is a great example of learning to ride a hydrofoil. In this video the guy is riding a Freestyle C A R A F I N O.
Notice the better he begins to ride the foil the more he looks relaxed. The more relaxed you are, the less your body will be trying to over compensate for movements.
Keep your eyes looking in the direction of travel. Not down in front of you.
What is so important is to let the kite pull you from the harness and not use your arms.
Keep your shoulders to windward, Point your pelvis to leeward, keep the legs straight and breath.
As you begin to travel across the surface of the water and the board begins to rise, just lean forward and bring it back down. Find your balance between these two movements. Shoulders forward towards the nose of the board to come down slowly.
C A R A F I N O