Here is the description on YouTube:
This video was only uploaded for the benefit of a couple of friends, we had no intention for it to gather the interest it has. We are not claiming this to be anything other than a strange encounter based on some of the reasons below:(via The Daily Caller)
1) We were able to view the subject much better than what the video portrays as it was just a simple point and shoot camera. Contrast was excellent due to the snow behind the subject.
2) The subject was clearly bipedal and was without snowshoes or a backpack and wearing all one coloured clothing. Movement over this kind of terrain in soft snow without snowshoes would have been very difficult and the distance traveled over the given time period would have been very fast for a human without proper snow travel gear.
3) There was a very steep drop off below where the video was shot, easily a 300m sheer face. We were not equipped with climbing gear and a descent around would have been impossible before nightfall.
4) We have encountered bears on the approach to this summit in the past, this video is most definitely not showing a bear or any other wild animal.
5) Perhaps the most reasonable explanation for this video is a very ill prepared hiker, hiking up a difficult section of snowline as opposed to a much easier route, one who is very physically fit and able to cover ground in unusually quick fashion and must have had very large feet as we were breaking through snow crust in just our boots.