Based on the observation on the distance between the begin of central and side marks on vegetation, one may think that in fact, a/c nose touched first.
This is a possible explanation for this distance to be shorter than the "wheelbase" of he a/c itself, as mentioned above.
The central mark appears to be wider at the beginning. That could indicate nose gear has collapsed immediately so the forward fuselage hit and began sliding. Weight to this area was then relived by main gear getting on ground, hence the mark becomes narrower and less distinct.
I've to say I'm a bit puzzled by the relatively tight yawing, occurred when the plane had three points on the ground already, and wings level as I hypnotized before. Not able to imagine if strong rudder action could have caused that but do not seen any other explication.