Because Ken Burns didn't make his living by making videos of him tossing a ball with his son. This guy is making a living by documenting his engineering via video. He is not a hobbyist, He is an engineer who makes money because people find his engineering projects interesting.
I didn't say professional engineer, I said professional. Not that distinguishment matters.
Him showing his engineering projects on Youtube and getting himself paid like that means he is a professional. The main difference between a hobbyist and a professional is simply whether you get paid for doing it.
I don't see how that is relevant, in fact it's not any different then any electrical engineering working in a company. No company is paying for engineering. Companies are paying for a product/service/feature. Engineering is just a means to an end. Exactly how it is for Youtube in this case. The engineering in the video entertains thousands making Youtube money.
Exactly - he is entertaining and maybe educating. So, fine - he's a professional entertainer or educator. If he were being evaluated and paid based on the quality of his electrical engineering output, then he would be a professional electrical engineer.
He is being evaluated and paid based on the quality of his electrical engineering output. If it's not good it's not entertaining for his particular niche.
But that is beside the point. Whether he is paid for "quality of his electrical engineering output" doesn't matter. He is paid for doing engineering, which means he is a professional.
Is he ? You are right that he isn't a hobbyist since I'm pretty sure he has formal training, but I thought he actually worked in an engineering related position. Did he make the transition to full time YouTube?