I had the privilege to visit Sapelo Island while taking an honors course at the University of Georgia. Sapelo Island is one of those rare places in the United States (and increasingly, the world) that seems completely cut off from humanity. We studied the ecology of Sapelo Island (a barrier island with marsh on one side), but the people that live on Sapelo are a study in sociology/anthropology.
I don’t remember the Reynolds Mansion looking that nice when I visited Sapelo, nor do I remember any of the construction shown in the video. It was just a small gullah/geechee community with a UGA research facility. With great food.