Is $100 for five hours of video worth the years of experience the author might have? For me, it is.
Though in my experience, the courses on Udemy/Udacity and the like have been disappointing. I always get the feeling that they're trying to fill up time, and they tend to move really slowly.
I've had more luck with books being very useful.
This 2-hour-course vs 10-hour-learning is a false dichotomy to me.
A course, or any kind of structured learning, is just a foundation. I would still expect to spend hours outside of the course, but with a good background I can now search for more specific things than if I had started w/ a blank slate.
I was there recently, some guys told me you can't make filament at home cheaper than what you can get from Amazon.
And then I made my own filament: https://medium.com/endless-filament/make-your-filament-at-ho...
Now I am selling my filament on e-commerce websites under my own brand name and making good money, I'll clear $4000+ in sales this month alone.
The expertise of a great teacher can impact you more than you'd expect.
A great example of docs I found recently was RedwoodJS: https://redwoodjs.com/tutorial