I think the dark object is the shadow of that tree, with the white branches as the white objects. See photos in #307 and #309. It's in exactly the right spot in relation to the helipad.
The video through the fence shows the departing chopper pretty much maintains a constant heading up to where it finishes just before impact. Looking at the onboard video from the arriving aircraft, if the climbing one is still directly in line with the helipad, it should be more nose on I would have thought.
If you take the point where the departure video freezes shortly before impact, and correlate that to be approximately where the choppers might be when visible in relation to each other in the arrival video, the helipad would, I think, not appear to be directly behind the departing one.
Last edited by Traffic_Is_Er_Was; 9th Jan 2023 at 03:22.