Well for one, Utah is a well-trodden place. VERY well trodden. If this was an arch in Utah or on the Colorado Plateau anywhere really, except for maybe the Rez, somebody (more likely many people) would have come forward almost immediately identifying which arch it is, but that didn't happen. So that was clue one. Secondly, to me the video looked like a composite rather than CGI where an image of a much smaller arch (maybe shin high or something) was exploded and then the video enlarged and combined with background stuff to make it look like a bigger arch. Anyway, I'm no video sleuth, but those were my first thoughts.Maybe I'm just an idiot, but what looks so fake about the arch video? Seems like it would take some serious work to CGI that and make all of those rocks appear to tumble so naturally.