Before you start, please note that english Is'nt my mother tongue. Thus, there are certainly some mistakes and nonsenses in this tutorial. I did my best, but st...
Hello Borixsticks, sorry for replying this late, I hope you managed to keep going since then. Now to properly answer you, this tutorial is getting old, I plan to rewrite it with waaaay less fluff. There is no need to read the whole thing, just focus on Matriax's effect and you're good to go as far as Construct 2 goes, it remains the best option so far, even to these days, as it seems.
However, it does have a limit : It can only handle 3 light sources. I had plan to write my own version of this extension, allowing the user to add more sources. It's still somewhere in the back of my mind, but I never got the required time to do it. In the meantime, you'll have to work around the 3-sources limit to add this kind of lightning in your current project or study the extension itself to make it versatile.
Finally, I don't think a video would be useful. I'll simply rewrite the damn thing this summer so it takes less than 3 pages. It's a painful read in its current state.