Thanks for posting the video, which I hope to watch later today.
I don't remember how I heard about this story... Maybe a magazine article several years ago. I bought a copy of Jack Hinson's One-Man War at that time. It is an interesting book, and may challenge some preconceptions about the War Between the States. Jack Hinson's rifle is still in existence, and Tom McKenney, the author of the book, provided a few black-and-white photographs of it, as well as a physical description. He said the rifle is stocked in nicely figured maple but is otherwise unadorned, iron mounted, and has fixed sights. It has a percussion lock marked "Warranted," which probably means it was a factory made lock. He said the name on the plate, "...now partially worn away, appears to be John Archer." I suspect the name on the lock was more likely "Jos. Golcher" (or Goulcher... I've seen both). He reported a 41 inch barrel "nearly 1.5 inches in outside diameter," in .50 caliber, with a weight of 18 pounds. What made this rifle unique was the fact that it was made to shoot a conical bullet, and a mould was evidently provided by the gunsmith.
McKenney also said this rifle has the maker's initials, W.E.G. marked on the barrel, for William E. Goodman, "of Lewis County." I don't know if that would be in Kentucky or Tennessee, as Jack Hinson's vendetta was right on the border.
Notchy Bob