It would probably be difficult to reverse engineer exactly what they did to make that production. It does seem as if it was a professional production though.
It’s unlikely that anyone can to obtain that clean of a recording in the country. The sound of nature (wind, leaves rustling, animals, etc.) never stops. They didn’t even bother putting foam on the mic. The vocals likely came from a good-quality sound room using a high-quality mic. The guitar also sounds extremely clean.
The camera having multiple shots is another giveaway. One person rusting around to take multiple camera shots would have likely also been picked up by a good mic. Also, the camera image quality is very good. A good-quality lens (look at the ability to focus) would have been needed. This wasn’t shot on a shoestring budget. This was likely produced using nice equipment.
They’re trying to sell a story that isn’t plausible. The guy isn’t genuine.