Wholly unimpressive and proves nothing. Most of his citations link back to a website called 23&me. That data alone would never be acceptable to be published in a peer-reviewed journal or as part of a broader scientific argument. They have no way of addressing the statistical biases as a result of their extremely small and nonrandom sample size. In short, it's all baloney.
Clans are very real. It is very real that many of you originate in Southern Arabia, while others originate in North Africa. This kumbaya idea is nothing more than propaganda by communists and immoral liberals/sjw who wish to dismantle a great heritage that Somalis have held deeply to for centuries.