As an amateur sawdust maker I've picked up a few useful tips from Sellers, and certainly my hand-cut dovetails (which I rarely get to cut) have improved since watching a few of his vids. But I too don't get the sycophantic comments about him being some sort of god or genius. I take the good bits and (try to) ignore the stuff that gets up my pipe - like whether to lie your plane on the sole or the side. And no, I'm not seeking to start that hare running again!
I've kind of wondered in the long term how well each woodworker would do if they saw what they were supposed to do and then spent no more time watching a particular joint (so, you get one good video of dovetails and then thereafter force yourself to identify one aesthetic problem each time you cut a joint or set of joints and solve it).
I'm thinking that the average person solving their issues with dovetail joints will be further ahead if they solve them than if they continue to look for more tips. We all need more instruction on design and standards than we do on how to hold a saw.
I don't know if this is coming across clearly as i'm in my "mid-afternoon slows" after doing technical work since 7am (it's 2PM here), but it occurs to me that what got me good at joints (good enough that I can make them to any reasonable standard) was solving problems with making them. And I'd bet a lot of people credit a given teacher for showing them how to do something that they would've learned to do on their own.
One of the hardest pills for a beginner (who is already often good at a profession and has to learn what it's like to suck at something for a while again) to swallow is what they're missing is desire and repetition in combination. The desire is usually to get a good result (or have someone promise it) without putting in the repetition. There's usually a bridge out somewhere on that road.