Looking and the video and comparing with Google Earth, it's fairly clear which ridge they hit. It appears the map with the red and green lines puts the crash in the wrong place. As far as I can tell, the crash site is around 6 42'46.10"S 106 44'06.09"E at around 1980m altitude (assuming you trust Google Earth). If that's correct, it appears they had the altitude to just clear the ridge, had they just been a hundred metres or so to the right.