Simulated Process Color Separation in Adobe Photoshop

I'M NOT THE OWNER OF THIS VIDEO!
Full Credit goes to FULL SPECTRUM SEPARATOR
His new youtube channel
/ @maxchromacolor
This video and user was on youtube about a year or so ago but then they vanished. Luckily I saved this gem of a tutorial beforehand. It seems to me like the screen printing powers that be try to go through great lengths to keep the power of color separations a secret. Well no more! Scott Fresener's reign ends here once and for all!
(will remove video if original author requests -_-)
This is by far the best photoshop simulated process color sep tutorial i've come across. None of that sh*t color range select garbage and over priced actions here. Hopefully this helps others as much as it helped me.