First of all, I am very new to 2.8, and I am really struggling with it after so many years of the old versions. At 12:52, after enabling Node Wrangler, you say to Cntrl-Shift click to get this action. I have node wrangler enabled but when I "Cntrl-Shift click" absolutely nothing happens. I also see no viewer.I can get close to your rendered imsage by using a mix shader and plugging the Voronoi and Principled BSDF in to output, but that isd not how you are doing this and I want it to be right. Please help. I am enjoying thus far.
ccharlie43 do you use right-click select or left-click select? I use left click which is the new default in Blender 2.8. So if you use right click, I would guess that CTRL + SHIFT + RIGHT-CLICK would produce the same function.