Hi skadi,
if you zoom in you still see, that the belly isnīt in the water, just splashes from the skidstruts moving through the water.
So the approachspeed, immersing the skids into the water, was just a little higher than perfect.
What you can see is the great clearance of the tail rotor.
That was the reason for my link! I did same excercises with BO105 some moons ago....
skadi