[0] URL of first part here: https://www.youtube.com/watch?v=h0AMaW4XRCI
So it often makes sense to not tilt too far into finely-crafting a low volume of work. Then I'll slap something together a "5 things people get wrong when doing $X." It's not bad but it's pretty cookie cutter. And it will blow up.
That's probably the best advice. These courses can't do anything about Youtube's algorithm changes, which is ultimately what will determine virality.
If your channel is not about toys, makeup tutorials or culture war commentary, it's unlikely your content will ever break through. So you might as well just go for a "good enough" video instead of a perfectly manicured one, because the algorithm doesn't seem to care either way.