Imagine a English person claiming he or she is a Celt or some other pre-Germanic/Anglo-Saxon British identity, it would be ridiculous because the ancestral component that has defined their current identity [culture, language e.g] came from their Anglo-Saxon ancestral component.
Same goes for the Egyptians who carry some Arabian ancestry from their early Medieval Arabian Liberators which has defined their current identity as an Arab one.
Despite that Egyptians do have much less Arabian ancestry than English people who carry high amounts of Anglo-Saxon dna [ranging from 40-60%]; the point still stands that Egyptians will always be viewed as an Arab people because of the deep Natufian ancestry that Egyptians & Arabians share. The guy in the video did touch on that shared Natufian ancestry, but he used the wrong term [Semitic].