In reply to Chris Harris:
Thanks very much.
Once the real mountain is pointed out and pictures checked, it's very obvious it isn't Everest. But at first I wondered if they'd inserted a picture of Everest into the film digitally. But in that case from that viewpoint, Changtse should be in the way.
Given that there's forest around Mount Tom, I presumed that they just filmed it there, rather than did any digital trickery.
IMHO Mount Tom viewed from the forest like that is a pretty damn impressive sight.