Consider watching the video with FreeTube, a nifty open-source program that lets you watch YouTube videos without Google spying on your viewing habits!
Combined with Libredirect, which automatically opens youtube links in Freetube, it becomes really slick and effortless to use.
I find it interesting how many pieces of media have been inspired by the book Killer Angels. Firefly joins Gettysburg (perhaps that one is obvious), and even Ken Burns sprawling Civil War Documentary.