Public speaking is great, but not sure if it’s easier to keep a recorded talk (or even a company blog post) up to date than anything else you have full control over.
I think the "keeping up to date" is a fools errand IMO. Because you end up with "half-up-to-date" documentation where someone thought to update some part of it, but not another. And it gets incoherent.
So my preference is a coherent story at a point in time
So my preference is a coherent story at a point in time