videos in the "woman with large breasts not wearing 
    a bra does something mundane" genre with multiple millions 
    of views.

Anecdata: even if they're wearing bras and not dressed in a revealing way and it's a still photo... the views will pour in.

I've had a Flickr account for about 20 years. I used to run a community and I took a lot of pictures at our gatherings, which were primarily 20-somethings. Some photos had 100-1000x the views of other pictures and it took me a while to figure out why.

The photos with surprising view counts had women with large chests.

I know how obvious that sounds but many of these photos were so lowkey that... trust me, it was not obvious. For some of these photos, we're talking about something that would not be out of place as a yearbook photo or hanging on a church's bulletin board. It would just be a group photo of people hanging out, nothing sexy or revealing, and rando woman #7 in the photo might be apparently chesty. And it would have 100x the views of other photos from that event.

Interesting and amusing.

There are a number of ways you could think about it. Some views might be attributable to people who can't access explicit content due to parental controls or local laws but I have a hunch some people actually prefer this sort of thing to explicit content.

(I also wonder if there's a slight voyeuristic/nonconsensual appeal to these photos. Which ties back in to the opening paragraph of the linked article...)

It also underscored for me how women, especially women with certain bodies, can't escape being sexualized no matter what they do or wear.