TLDW: The thesis is If Germany won WWI, the conditions for the Russian Revolution and Weimar Germany would not have happened which would have prevented the Nazi rise to power and thus WWII.

The video leans heavily on hypotheticals, and I question if things really would be different if Britain and France were given the Versailles treatment instead of Germany. We probably would have seen another socialist French revolution at the very least, and with the British empire being what it was, I would not put it past them to kick off WWII instead.