The Egyptians have tested autosomal and Y-DNA markers of three Pharaohs of the 18th dynasty : Amenhotep III, his son Akhenaten and grandson Tutankhamun. The aim was to determine the cause of death of Tutankhamun, who died at age 19. It appears to have been malaria.
Although not yet published officially, the Y-DNA results were said to confirm the paternity between the Pharaohs. The video from Discovery Channel shows the Y-STR results*, which appear to be R1b and indeed the European R1b1b2 rather than the Levantine/Egyptian R1b1a. R1b1b2 is quite rare in modern Egypt (2% of the population) and was assumed to have come mostly through the Greek and Roman occupation. R1b1a makes up 4% of the Egyptian male lineages and dates from the Paleolithic.
The 18th dynasty (starting in 1570 BCE) follows the period of Indo-European expansion to Europe (4300-2000 BCE), India, Persia and the Middle-East (1700-1500 BCE). The Hittites took over central Anatolia from 1750 BCE, and the Mitanni (of Indo-Iranian origin) ruled Syria from circa 1500 BCE.
Egypt's 18th dynasty inaugurated the New Kingdom after the Second Intermediate Period, when the Hyksos ("foreign rulers") took over power between 1650 and 1570 BCE. It is very possible that the 18th Dynasty was of Hyksos origin, which could be Hittite or of other Indo-European origin. The Hyksos were described as bowmen and cavalrymen wearing the cloaks of many colors associated with the mercenary Mitanni. This strongly suggest an Indo-European origin indeed, as the steppe people were mounted archers, and the Mitanni are of proven IE origin.
*Only three STR results have been officially published : DYS393=13, DYS458=16, GATA-H4=10
N.B. : There is always the possibility that the video did not show the actual results of the Pharaohs, but those of someone of Western European descent from the US, thinking that nobody would look carefully. This would seriously damage the credibility of Discovery Channel though. I would be that they completed made up the video and the images bear no relation to the narrative.