Astrophotography is one of the most rewarding but complex genres of photography. There are a lot of steps that go into creating a great image of the night sky and Milky Way, and what better way to learn than to watch somebody do it from start to finish.
Astrophotography has a higher barrier of entry than most genres of photography and arguably a higher skill ceiling too. Although it isn't difficult to capture the stars, capturing them well is, and it requires a well-rehearsed and fleshed-out process. While the shooting phase can be tricky with the capturing of stars without motion blur and so on, it's the post-production phase that plunges the photographer deeper into the realms of knowledge to get the most out of the shot.
When I first tried astrophotography there were no video tutorials, only some written ones, and it took a lot of trial and error. I can't think of a genre of photography I have tried where I have been left disappointed at my results with a higher percentage than astrophotography. So much can go wrong, and even if you get everything right, you need to have a good understanding of how to bring out all the elements of the image in post.
That's where videos like this one from Brent Hall become invaluable. Watching someone create a great image of the night sky from scratch will give you a far better understanding of what you need to do and how each step affects the final image.