From 7:24 onwards:
For example people often think that Europeans are homogeneous group that arrived in a simple way there maybe 40 or 50 thousand years ago maybe based on the archaeology and just kind of sat there until they became the Europeans they are today, but that's probably not true: the Europeans today are a replacement population who came in much more recently and replaced the people who were there originally 40 thousand years ago.
Previous hints about Europeans: one, two.
People in Africa certainly very diverse, but in fact there is very deep strands of variation in Africa and for example West Africans, people, the primary ancestral group of African Americans today, are actually turn out to be mixtures of very differently diverged groups that go very deep in time. So this is all very interesting, also true for East Asians, people in China today are not the same people who were there from the first time 40 thousand years ago, in fact they are a replacement population largely, that arrived after the first people there. So you see this history of more complex population movements than people think at first.
All these themes ought to be familiar to readers of the blog, and I personally can't wait to sink my teeth into the new research results when they finally see the light of day.