In the last video we looked at a similar stove, but one that was much more complicated and did not leave any "room for error." This bench stove / masonry heater is much easier for us to make and the design makes a lot more sense to people like you and I who are not multi-generational stove makers in Russia.
Here is the original video:
https://www.youtube.com/watch?v=lqcB6GODbGY&t=1009s