I had watched that vid a few days ago.
One thing that occurred to me. Those “almost Clovis” points and tools, might have been the product of a less skilled individual of the same culture. Maybe someone in a smaller group that didn’t have the benefit of being able to have specialists and didn’t have a deep talent pool to draw from.
a less skilled individual of the same culture
I think he actually said that it was the prevailing speculation, more or less. :^).