Tbey are making lumber not firewood. That is a mill not a logging machine and do you know how many Pony Express riders you displaced by typing your post on a computer or phone?
The factory demonstration pales in comparison to this field head for making firewood on the spot...https://www.youtube.com/watch?v=fQQjxe0-Sdw.
Keep watching. Later in the video it shows a factory making firewood. Pretty impressive if you ask me. A hell of a lot easier than swinging a maul!
Right that’s a portable saw mill in action. They come in all sizes, but the local farmer can mill is own lumber if he needs a new shed or barn.