Does this work with Blender 4.0?
I think that tutorial was intended to help you transition when Blender changed the entire UI and a bunch of other stuff. So if you didn't go through the big change, the 4.0 Basics it's a better watch. Linking you up Scotty:
https://cgcookie.com/courses/blender-basics-an-introduction-to-blender-4-x