Don't get me wrong, I also think that there are such things mostly because of the longevity of stories from Native Americans also.

But, he is pointing to a trail that was conducive to footprints but, there is one facing one direction and one pointing the other way basically. What I would expect in such a scenario is at least some tracks that overlap in such a narrow trail and at least an series of left foot right foot imaging. That seems almost never to be the case of tracks leaving a trail behind that could be recorded.

As you point out their hearing would be very finely attuned to humans entering their space even if the wind were right to mask scents. They would seem to need to not only be large but also agile. The Patty footage does show a less lumbering more athletic creature.

The only thing that might negate it is if as stated he sees them regularly and they him, that they deem him harmless and are wary nonetheless thus moving on.
But, crossing the path is odd behavior. I could see hearing his approach and taking cover off trail. But, crossing into view for camera seems sketchy.