Reply To: Connecting Shader to Principled BDSF does nothing.

Hi Daniel,

It sounds like you are in Solid Shading Mode. Switch to Material Preview, or Rendered Mode (like in the video):

Maybe you should watch the Blender Basics first (again): https://cgcookie.com/courses/blender-basics-an-introduction-to-blender-3d-4-5-lts