I have no interest in doing so myself, but I'd be curious to see a demonstration on video or something of one of these chemicals being produced clandestinely. Preferably a simple one where a layman could grasp the process. Chemical doesn't matter to me, except not meth, of course, there are enough documentaries of that. Curious as to whether this exists.
There's tons of videos about coke, heroin, meth, weed production.
But AFAIK there isn't a chemist out there that releases a podcast of different syntheses. You won't find step by step guides for most drugs out there simply because it is something only an expert in their field can do.
It is a high risk and highly dangerous thing to do and requires exquisite skills and knowledge.