Two scenarios that fit the external footage for me:
1. Problem with power on final approach. If the approach was to the wrong runway it has to be considered. Any lack of radio calls can be explained by the crew's knowledge that they would be the only aircraft movement in the area, and therefore devoting 100% concentration to try to fly to the airport. High AoA not evident to pilot flying looking outside the cockpit trying to nurse it along, unknown thrust from engines that may have sounded ok in the cockpit, before the pilot flying finally realised that a stall is imminent. Just before the wing drop you can see the nose coming down fractionally, indicating that the stall was commencing and a push over was begun, unfortunately too late.
2. Same as 1. but pilot flying has lost situational awareness, fixated on an unfamiliar approach and allows the plane to reach high AoA before realising a stall was developing but by then it was too late. Both pilots might have been looking outside for the runway, with engines sounding normal, hand flying and the yoke being gently pulled back too far, loss of airspeed that suddenly resulted in a stall once the bank angle increased beyond a point, and from which there's no way to prevent the plunge into terrain.
But then again, looking at the footage once more, maybe what I thought was a nose down push was just the start of the stall. In which case the plane was flown all the way into the stall, something that could be explained if it was a desperate attempt to keep flying without enough thrust.