Maybe the footage is misleading?
An observation of this very sad incident……
I'm not convinced it's genuine footage of the incident. The aircraft certainly appears to be travelling at near right angles or at least at a significant angle relative to the road upon which the dashcam vehicle is travelling. (There is also a clump of trees to the left where there is now a building unless the depth of field is deceptive.)
As others have mentioned, to impact the building where it did, it would have deviated about 30 degrees to the runway centreline assuming the deviation commenced a few hundred metres before the runway intersection. The impact scars on the top of the building seem to indicate that the aircraft's trajectory is consistent with that.
The road on which the vehicle is travelling is no more than 10 or 15 degrees different to the projected flightpath. How then does the aircraft appear to be at or near right angles to the road and wings level, even with significant yaw occurring?
Again as someone mentioned a few pages back, one video source suggested that the roof of the building had what appeared to be slashes through the steel that suggested it had been cut by a rotating, forward moving propellor. These were to the left of the initial impact damage possibly indicating that the left propellor was still rotating. It's possible that it could have been caused by the right propellor but not if the aircraft impacted close to wings level.
None of this is in any way definitive, just my observations of a tragic accident that always seems to have greater impact when it involves one of our fellow aviators - even those we don't know personally.
RIP Gentlemen.