https://www.outdoorexposurephoto.com/video-tutorials/tk8-video-guide/

The TK8 Video Guide is your classroom for the TK8 Photoshop Plugin by Tony Kuyper. The guide shows you how every feature in TK8 works. TK8 transforms the way photographers like me use Photoshop. It quickly generates advanced masks, such as luminosity masks, and makes Photoshop smarter, faster, and more fun to use. This tutorial series will help you get up and running with the TK8 plugin quickly. It reviews how to install the modules, how to set up Photoshop for luminosity masks and how to use the various buttons. It includes plenty of examples and even a 30-minute complete workflow demonstration.