I landed the 707 (Ecuatoriana livery) a few times at Quito airport (SEQU), 9,200 ft (2,800 m) above mean sea level, and I never had any kind of problem with ILS, althought it was always a very hard approach to landing because the high surrounding mountains, mainly at night and with bad weather.

I saw the video. It seems your final approach was very fast - approximately 200 knots - and you touched the runway at approximately 190 knots. I usually do it at 140 knots with full flaps. But it was a nice hard landing, despite distressed passengers. ;D