Aside from ones I’ve already mentioned:

• The Thought Emporium (purposefully infected himself with a self-made genetically engineered virus, to fix his lactose intolerance, as well as (CW: Gore) made a tutorial on how to give yourself magnet implants, now trying to teach living rat neurons to play DOOM)

I am really frustrated that I don’t remember the names of these:

• someone who made a tutorial on how to make an illegally encrypted radio transmitter
• some guy making seemingly illegal chemicals (NOT nilered)