in this lesson they demo in green with version 4.1 ... I am usign 4.3.2... In Object Mode , Object ...there is no Shade Smooth By Angle.... only Shade Auto Smooth: add modifier to automatically set the sharpeness of mesh edges based on the angle between the neighbors faces. i go to Modifiers, add Normals. it gives me Normal Edit, Weighted Normal and Smooth by Angle. So, do I pick Smooth By Normals? what will happen next?
Don't worry, Blender lingo is like a foreign language, all those functionalities and operators never make sense when you read them, is only when you see them in action and you practice with them, see what they can do, see when you make a mistake and so on. Right now reading the explanation is confusing, but as you apply it on practice more and more it will start to make sense.