That's a fantastic video of a bear utilizing far and away his most important sense! I have been fortunate. In 13 years only one problem and that was a female with 4 rambunctious cubs. I use nearly the same kind of mounts and one morning momma pulled one down with her paw and snapped the eye screw. The camera survived.
Since May 4th this year I can id 6 different bears on the cams, not counting cubs. I know I have been very fortunate not to lose any cameras and thought my clean hand rule was the main reason. However you're correct, I doubt that would fool a bears nose.