[hilbert42]

"The whole context and presentation seemed like it was designed to make the viewer feel like they'd learnt something even though nothing of substance was really delivered in those 20 seconds. He does that a lot."

I can't disagree with that. He's not only a YouTube presenter but also a documentary maker, His documentary Uranium: Twisting the Dragon's Tail https://www.imdb.com/title/tt4847012/ has been repeated on TV where I am, I think, at least three times. He's also made others.

Unfortunately, that type of presentation is all too common in modern docos (probably couldn't get it past the director otherwise). As you'd know, this and similar techniques (which I find highly irritating) are also used to pad out half-hour shows to an hour and or to multi episodes when one would do adequately (thankfully, my PVR comes to the rescue and I rarely watch them in real time).