Thoughts
Mark Rober feels like he should be an Middle school science teacher. His stuff is entertaining and technically correct, but it's so shallow.
That's kind of what you have to do when you're doing science for a mass appeal audience. In some ways it's very similar to Mythbusters (which I love). Both understand the scientific method, understand the science behind what they're doing, and are doing original science.
But their goal, first and foremost is to be entertaining. Since I can tell that, it makes the science less appealing.
Mythbusters didn't have to compete with the internet; Mark Rober has to compete with Youtubers are doing much better science (if less fun).