It is pretty wild stuff. I think it works so well because English and German are so closely related. I've heard English speaking people can learn fluent German in about a year.
He certainly was an amazing public speaker.
To keep that energy and cadence that long has to be hard.
Listening to him speak in my native language gives a really fascinating look into the mindset of the people's of that time that would be much harder to get from books.
All together just more entertaining than the one I heard from Mao but I would love to hear these from All world leaders of the past.