I linked to the start of the section where he begins discussing the migration of the Turks into Iran (39:10). Discussion about hybrid camels is from around 45:26 onwards.
Amazon link to his book: Cotton, Climate, Camels.
Here is the entire playlist of his 46 lectures on World History, of which the first link is lecture 13. His lectures are not just him retelling the material in the textbook, but rather gives criticism about how the textbook was constructed (He is the lead editor), and stories from his own research:
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