I'm not an Airbus pilot (just 747), but there are 2 possibilities that come to me immediately:
1) He may have had the autopilot coupled, and decided to go manual at the last moment.
2) He may have tried to "kick out" the crab angle just prior to touchdown, and grossly overdid it, setting up the PIO.
With such a variable, gusty wind, I prefer to fly the airplane manually most of the way down the glideslope, so I can get a better feel for the excursions. Also, the 747 autothrottle will not keep up with significant gusts. I prefer to keep a relatively constant throttle position and allow the airspeed to fluctuate around the bug speed somewhat.
Also, I don't attempt to "kick out" a crab angle, but smoothly add rudder and aileron in the last 50-100' of altitude. The 747 will land in a crab, so there is no overriding reason to try to eliminate all crab and risk the overcontrol.