The A320 does not have castoring mains. Use of wing low technique (roll input) results in spoiler panel deflection on the upwind wing to assist in roll control, thereby reducing lift on the upwind wing. This causes proverse yaw, which opposes rudder input. It can also result in an unexpected "dipping" of the upwind wing close to the ground, potentially resulting in a situation like you see in the video.

I had to make 2 landings at the max demonstrated crosswind limit (33G38 at 90 degrees) in one day in the A320. On both landings, I used only rudder, no aileron, and they worked out fine. Same thing goes for takeoff. Rudder (with a little extra forward stick pressure) is sufficient to maintain centerline at the max demonstrated limit of 29G38.