He is mentioning a lot of outdated pseudo linguistic jargon like Hamitic, which has been overturned by modern linguists.
If you want updated information on Somali language and its development, there are two linguists i would highly recommend and that is Abdalla Omar Mansur and Christopher Ehret.
Abdalla Mansur may Allah reward him, has done the lionshare of the work of documenting, recording and studying the Somali language since the collapse. He was the former Head of the Languages Department at the Somali National University