That video didn't have a single person that wasn't white and young adult/middle aged. Maybe the hat guy is older, but still – diversity didn't seem a priority in the list of features. Maybe that's entirely representative of the demographics, just found it striking.
I'm not sure about age. My anecdata is that I know a reasonable number of people who have moved to, more or less, "the mountains" when they've retired--for at least part of the year. But based on my observations hiking, skiing, etc., the participants in those activities in much of the US are pretty overwhelmingly white, as are the long-time population of cities in the Mountain West.
This isn't to excuse the white-washy-ness of the video (e.g. lots of cowboys, no Indians), but just to say that the problem is at least a couple of levels out from just this video.