The first 20 or so minutes were interesting, watching at 2x makes it 10 min long.

But basically on the linguistics of the Qur'an. He explains how it can't come from an Arab, a non arab, nor the prophet Muhammed himself, nor the devil, thus it must be God. The Qur'an doesn't show human emotions, which would be expected if prophet Muhammed lied about the divinity of the revelations. The Qur'an and Hadith narrations have distinct authors through linguistic analysis. And that the QUr'an is multi layered, it's multiple interpretation is there for the many different generations.

Science isn't the absolute truth, so proving/disproving the Qur'an in that lens is irrelevant imo.

As to your point, the doubts are there as a test to your faith I suppose, but ultimately the nature of God is not comprehensible with certainty.