In the Durant video, he appears to start rotating his head forward well before he completes his backswing, it seems like he gets his head pointing to Follow-Through long before his arms arrive there, like pre-setting his fulcrum to its most effective (and comfortable?) location ....
Annika Sorenstam and David Duval make a similar move through the Ball. As I recall, Andy Bean and Paul Azinger do so on the Backstroke as well. But check it out...I'm operating from memory here.