@Paul4JC, right now I am (slowly) going through the first video. At 11:50 he mentions calling his friend in New Zealand at the beginning of his journey into the study of the origins of the language. He names Brian Colless. This is the linguist whose blog I linked to in my previous post. Just thought I would mention that.
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EDIT: Now having watched all of the first video I can initially say that I have the same problem I have with every linguist involved in this particular field of study, that is, that proto-Semitic is not a byproduct of the Egyptian hieroglyphic language. Egypt as a people, (Mitzraim), didn't even exist until after the tower of Babel incident and the division of the earth, (land), in the days of Peleg. It was only after this division of the land into the various tribes and peoples of the Genesis table of nations that Ḥam/Mitzraim were given the land now called Egypt, (Egypt is called Mitzraim throughout the scripture, after the name of Ḥam's son, Mitzraim, Gen 10:6).
It is this error, imho, that hides the reality from the eyes of researchers; and one of the biggest reasons is for siding with the Masoretic genealogical chronologies in Gen 5&11 while ignoring the Septuagint which is much longer. The LXX chronology brings all of these things into alignment while the Masoretic chronology forces the unsuspecting researcher to place the Egyptian hieroglyphic language before the proto-Semitic language.
The origin of the proto-Semitic language is the heavens, specifically, the stars and their constellations, not Egyptian hieroglyphs. The beginnings of proto-Semitic may be found in the place now called Har Karkom, which of old time is Har Sini, "mount of Illumination", (not as it is now pointed, "Har Sinai",
mount of Thorns or
Thorny mountain).