I'd like to give them the benefit of the doubt but a replay of the video shows more of a 'skip' than a 'bounce'.
I was once on the jumpseat for a very heavy landing into Heraklion (though no airframe damage) and there was a very pronounced nose down moment after the initial touchdown. The handling pilot swore he did not put in a nose down input (nor did he flare, but that is another issue)
If he didn't flare, then the elevator would have been in a fairly neutral position, which would have led to the nose dropping rapidly after T/D. Also, the oleo travel was probably taken up pretty quickly, leading to the undercarriage/airframe combo acting as a rigid object from an inertial point-of-view.