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I also highly recommend checking OpenBSD's events page for additional slides/papers and videos.

Its talk slides, but I personally find the slides easy to just read, even if you have to keep clicking for the next slide.

A quick googling finds this https://events.yandex.com/lib/talks/103/ which is, I think, Theo presenting the slides on part II.

Would be neat with a keyboard shortcut in one’s browser that would go the the next page. (E.g. increase 00001 to 00002, etc.)