Just watching that now. Nile Red is using an older process. The process described in the article is a new method published 2 weeks ago that is much simpler and leaves most of the lignin in the final product.
I've only recently come across Nile Red, and I highly endorse his videos. I somehow managed to spend over half an hour watching him extract water from epsom salt, and even though it was nearly the equivalent of watching paint dry, it still remained fascinating to watch.
Ironically, it turns out that paint drying is an incredibly complex and fascinating process. Whether it's acrylic, latex, oil or resin-based paint, there are some deep things happening in there.
I actually once got a job (partly) by discussing the chemistry of crosslinking polymerization in oil paint with my future boss.
If you like Nile Red, also check out Cody'sLab and Explosions&Fire. Cody does all kinds of wacky things like drinking diluted cyanide. Explosions&Fire synthesizes all kinds of weird explosives, some of which even scare chemistry professors.