crazy location!
The caption in the video above says it was taken in Gagalphedi, approx 7 km NE of the Runway 20 threshold at the base of high mountains. Amazing that they got that low so far from the runway.
It looks like they flew north past the airport, right up to the northern end of the Kathmandu Valley and turned around at the last moment before impacting with terrain there, then missed 20 while heading back south (shortly after this video clip).