It’s very interesting listening to this, i understand most of this.
You may have noticed the Paa’ letter. In semitic languages, there is the Pe letter, but when arabic diverged it became just the Faa’ letter. So sæpoh is pronounced sæfoh, and it means “His sword”
In hebrew you can notice this, with the Pe/Fe letter.
I highly recommend his channel, he has accurate readings and makes some incredible content.
PS: Allat is a pre-islamic arabian goddess. https://en.wikipedia.org/wiki/Al-Lat.
An interesting fact to note: How al-lat is pronounced.
In arabic Lam is pronounced softly, with the exception of one word only: Allah, it is pronounced ɫ. (Like how L is pronounced in American English.)
Here you can hear Allat is also pronounced with ɫ, and it is the only word pronounced like that. So in Arabic emphatic Ls could have been a “holy” thing, like capitalizing G in god. Nowadays we do not pronounce it as Aɫɫat, only al-laat.