Nice find! Yet to watch the vids, but I like the Russian bedroll version much more. It's based on the standard issue felt greatcoat (overcoat), which works as a great wool blanket, water repelling, but quite heavy:


Can be carried in various ways, stuffed with gear and supplies, but the best way to carry it, imho, is "skatka":




What I like best is that you can distribute the weight in the front and in the back evenly, as well as its "best in the industry shoulder strap padding"



When wearing the coat, the stuff goes into the super simple backpack - a plain flat square bag with the single loop of quite a long and strong strap (often just a rope) attached to the lower corners, tightening the neck of the bag by its middle length to form two shoulder straps):