The challenge is when you research any hobby you run across people demonstrating things on youtube that have monetized it. This is because of SEO and they have engineered their content to show up in the best way possible. What you aren't seeing are all the people that like to just do stuff for the fun of it. The ones that do stuff for the fun of it and post poor quality videos online aren't going to surface in results as much.
From watching some hobbyists who turned professional, turning a hobby into a successful youtube channel looks to involve: script-writing, video capture, video editing, lighting, sound, audio editing, SEO optimization (thumbnails, descriptions), affiliate marketing, analytics, and also doing the actual hobby. Also you have to be really good, entertaining or different in some way that sets you apart.
From watching some hobbyists who turned professional, turning a hobby into a successful youtube channel looks to involve: script-writing, video capture, video editing, lighting, sound, audio editing, SEO optimization (thumbnails, descriptions), affiliate marketing, analytics, and also doing the actual hobby. Also you have to be really good, entertaining or different in some way that sets you apart.