I watched the whole video. He is amazing, as always. Definitely some understanding of chemistry is helpful.
It’s kind of slim on the laser side of things, as in not going into a whole lot of detail. More on the chemistry side of things. He’s got a 60 watt, but it doesn’t seem to need lots of power.
PLA is not suitable for this method. He doesn’t mention any other FDM materials that I noted.