This is a very good tutorial Russell and is quite in line with my understanding of the dng profiling process. He even gives you the answer you are looking for. If you want to use dng profiles without sticking with Adobe, the Iridient raw converter is a solution. It sells for around $US30, so is quite affordable; although it looks like there will be a need to pay out every 18 months or so as new versions come out..
http://iridientdigital.com/
Let me take exception to one or two points that he makes in the video:
1. The usefulness of a tungsten profile - 10 - 15 years ago I would have agreed with him as the predominant source of artificial lighting was tungsten and shooting under those conditions would have been a fairly frequent occurrence. Over the past few years traditional tungsten lights have been phased out and replaced by other light sources including compact fluorescent, halogen, LED, etc. These all have significantly different response curves, so which one to pick.
My solution is to do a custom profile; effective a "one shot" approach under those lighting conditions, if I need supreme colour accuracy and then use it only for that shoot.
2. He does not mention flash at all. While flash does have some characteristics of "daylight", the source is not sunlight, so the curve will be different than daylight. This is even more important as the flash tubes age, the colour of the quartz flash tube will yellow, so the curve will change over time.
I have two working profiles that I use; daylight and flash.
Unfortunately, I do not own a photospectrometer (just a colourimeter), so do not have the tools to do an advanced analysis of light sources.