Thanks for the feedback guys, much appreciated.
My first thought was at wheels contacting the ground "WTF!? How come we touched down already!?" I didn't want to balloon and expected to have more "leg room" to float before starting to pull the stick back for the flare.
So I think I misjudged the height because the runway was narrower than what I am used to. I am not sure, but I might have also split my attention too much, as there were parachuters crossing the runway shortly before me, and one was still on the wrong side, walking towards the runway. He or she stopped just in time, but I had to keep him in the corner of my eye, to ensure that he/she doesn't walk onto the runway while I land. (He or she is captured at 2:07).
Also found this additional information about the risks associated with flat landings.
Flat landing = Bad landing?
(The answer is yes, it's worth at least a bit of imaginary flogging
)