Well, tried and tried but cannot get the video copied to my post. The video was on a fb post but I can only manage to load a photo - I will try the link to fb. And BTW - if you do a search for videos of wood splitting you will find dozens of fascinating ways people split wood.
Since this video is probably created in Russia, let me be an expert for you.
There is a military stove intended for military tent heating. It is small and made of cast iron, that's why the firewood blocks should be short. They provide heat while active only.