Amazing Nigels
Nothing like a boot full of INTO wind rudder to give you a nice crosswind landing 
From what I understand the FBW detects the crosswind gusts as side slip, then corrects for it, ie the large deflection seen. It doesn’t care about the centreline, it just wants to remove the sideslip. That becomes an issue if one isn’t aligned and you are attempting to get back aligned at 10ft, meanwhile the drift continues to get worse and worse.
The lateral corrections you can see here would indicate they are possibly chasing the centreline. Certainly becomes very challenging in an aircraft with so much inertia, you let it go wondering in such conditions it’s very hard to bring it back. You also let it float (ie early flare here), the drift will get progressively worse, throw in the FBW correcting the slideslip, assuming you are not aligned, and it’s very messy.
They certainly took the right exit option here, landing this one, many will overdo the rudder once the gear hits and she will be all over the place.
