It's a matter of experience. The 2nd grade comment was an analogy. I am not a super experienced woodworker but I've been involved with it a long time and over time you pick up a few things. When you've seen your 1500th shaker table or 450th Morris chair, it might get a little old to you too. When you've seen the identical joinery method used show after show, season after season, magazine after magazine, it might get a little old. Believe it or not, there are woodworking periodicals going back to the 18th century, and if you read them, some of it is novel and some of it is very familiar. 80% of my woodworking knowledge comes from the Tage Frid trilogy, because they are that good. Learn your foundations.
Here's the thing, I have tremendous respect for the amateurs on Youtube pumping out videos. Some are hobbyists, some are making a living. Those guys must produce interesting content video to video and ratings are instant. Television isn't like that. You sell a season, you get paid, it doesn't matter what you do as long as they can sell ads during your show. Here's another difference, some of the Youtube woodworkers are making 30, 50, 75 videos a year and doing most of that work by themselves. It has reached a point where (in my opinion) the amateurs are better at it than the professionals. Even Tommy Mac's show is starting to feel a bit old fashioned and poorly edited compared to what is becoming the norm. Don't get me wrong, there is a big difference in knowledge and experience between Tommy Mac or the Woodsmith guys and the average YT woodworker; but that knowledge and experience isn't being translated well.