Disagree with his opinions.
His comment about duration of slavery in the different regions is off.
Chattel slavery generally went on for a longer span in the Caribbean than in modern mainland USA.
In many of the islands, the plantation system began before the 1600s began. Many of the colonies changed hands during that era. The British controlled Caribbean abolished slavery in the 1830s. In Cuba slavery ended in the 1880s, in PR in the 1870s.
And in mainland USA, different Northern states abolished slavery years and decades ahead of 1865.