This UPS DC-8 is landing in Ontario, California..... not Denver. Denver's airport is much larger then what we see here... and the Rockies are much further away from the airport then the mountains in the video. I was in Denver just 3 weeks ago.
It was a close call.... not sure if you guys have seen the recent incident with a Lufthansa aircraft landing in Hamburg... you can find it here:
http://www.youtube.com/watch?v=z42fchrzhHY
The aircraft's wing actually impacted the runway... but the First Officer, who was flying at the time was able to recover and take the aircraft around for another landing approach, which was a successful one!