First, it reinforces that the cartels are a huge part of life tor real people, not some theoretical issue “somewhere else”. It personifies the issue.
Second, I don’t buy for a moment the idea that it will turn our kids into sicarios. If anything, knowing that world actually exists just under the surface and so nearby should give pause to people who are flirting with the edges of it.
As for large brands advertising on these videos, anecdotal evidence says it hasn’t slowed anything down. Additionally, brands already have a tolerance being alongside problematic content to some, though not unlimited, degree (see YouTube).
I bet "They're showing heinous shit to the childrens" is a big reason for urgency, too. Like people have kids and immediately forget that they were kids, saw all that themselves, and came out ok.
I agree, this interpretation seems more likely than submarine patent [0]: "Analogous to a submarine, therefore, submarine patents could stay "under water" for long periods until they "emerged" and surprised the relevant market. Persons or companies making use of submarine patents are sometimes referred to as patent pirates"