I hear what you're saying here. On the last point first, I think that being dazzled by technical brilliance to perhaps the detriment (or perhaps just a general ignoring) of the broader musicality is a common thing that has been going on for ages. It's interesting that you bring Jaco in for this example because, back in the day, he was fiercely admired for his technical proficiency, even if nobody completely understood his musicality because it was unique to him and pretty much unheard of until he brought that style of playing into studios.
But 40+ years later, put on a Jaco record for someone younger and the odds are good he'll be dismissed as just another player with those kinds of chops, and they'll pull out the names of three or four young players they think are better, who were hugely inspired by him, but they're the people they are more familiar with. That's what happens as time marches on.
So, to another point, I am not saying that what Davie is offering is the same content as a music video. I'm saying that we have enough of that kind of content, and he's offering a different entry point that appeals to a younger audience. His body of work isn't a complete study in all things bass, by any stretch, but it offers something that draws people in through humor and skill, and might inspire someone to pick up the instrument. I just think there's room for all of it, and I long ago gave up trying to figure out why younger people like different things than I do.
I didn't go out of my way to listen to the big band music that my parents grew up with, though I grew to appreciate it much more as I got older, so I just see it as the same sort of thing. I don't watch his videos, but I respect that they have something to offer to those who do.