I also can't help but wonder where Alec and Crystal were that it took 2 hours to get the dog help. I would think that somewhere in that time they would have been able to just grab it and throw in the car, or at least chase it away from the road.
They apparently rescue dogs on the side so chasing it away temporarily for it to return to the same area isn't particularly consistent with what they hope to do (i.e. actually rescue the animal). As for why it took hours to get help, it's likely that any official body (whether police or local animal control) had more pressing things or simply were in no hurry to respond to a non-emergent situation of a loose stray not actively threatening anyone.in such a remote area. If you follow another youtube channel unrelated to trek (Hope for Paws), some rescues take hours in order to safely (both your's and the animal's) get the animal to trust you or simply catch it.