This is really good. As for the next one, the logical place I would start would be explaining the basic fleet ship triangle, starships, and scouting. I'm sure you'll cover all of the need to know stuff in any case.
The value of raiding in concert with some of the new features like ai eyes, and the ai datacores would probably be a good thing to cover as well, though it may be out of the scope of the second tutorial. The audio was fine for me, by the way.