Odd, I thought. Does he see himself going to Africa for a conference? Does he think there are many people among his followers who are in need of this exotic advice?
But then my curiosity got better of me, and I clicked the link.
The talk is very mediocre and wouldn't deserve mentioning at all but for the almost comical thing which is that it doesn't deliver on the promise of its title — it doesn't address any specifics of African conferences that foreign speakers need to be aware of. It's like those weird articles in the Smashing Magazine about CSS transitions in Vue and Nuxt — it's about some commonplaces of public speaking in general.
Did Ben listen to that talk and decide that it was a good one that deserves to be shared more broadly? Possibly, but I have my doubts. Why did he decide to share it then? I suspect it has something to do with that social justice thing.