I do think nostalgia, even for a time someone wasn't alive for, is a big factor. Another is authenticity, the title is telling on the comparison video. Which is "more authentic?". I think with so much fake stuff out there, or over polished, commercial media, that there's naturally a desire for something real.
I know a young woman, in early 20s, who last year shot in miniDV for the nostalgia and poor quality. That surprised me because I remember when miniDV was considered high quality (compared to what low budget video makers had access to previously). Things move on.
There's also trends, as the saying goes, when hemlines are down they can only go up. Now that people can do 8K pristine video easily and cheaply, then low quality and dirty is a refreshing change. About 12 years ago I was searching for, and found, a pocket camera that saved in raw. It was great and I loved how I was able to edit in post nicely, etc. This year it died and so I pulled out the old jpeg-only camera from the drawer and I've been shooting with it. Now, instead of cringing when I see the jpeg artifacts, I accept it as a normal look for a cheap snapshot and kind of a style that's now "approved" by others (at least on YouTube.) The ergonomics are great too. I can have it in my side pocket and while cycling, reach down with one hand, put my hand in the wrist strap, turn it on and take pictures without stopping. You can't do that with a phone. I sometimes wish that the amazing image stabilization and other features that iPhones have was available in a little pocket camera.
Anyway, I can dig all sorts of things. It's just another brush to choose.