His last few years of videos has been a deep dive on manufacturing learning everything he can. Basically he's independently come to the conclusion that chasing profit and maximizing it at the expense of product quality and treating people right is the problem we face and no amount of engineering knowhow is going to fix that the system does not prioritize people or quality.

Him having a YouTube audience already definitely helps a lot but hes also not exactly explicitly advertising it, and even talks about how he doesn't want his science communication channel to become a scrubber advertising channel.

Edit forgor some words