Kurzgesagt is one of the most popular YouTube channels, with over 23.6 million subscribers, and individual videos often getting millions of views. The videos tend to be on the topic of science, philosophy, culture - sometimes overlapping with Effective Altruism themes.
Their most recent video covers factory farming, focussing on the economic reasons why conditions on factory farms exist and what consumers of meat can do to make better choices.
One of the issues that negates growth in the ethical meat market is that it is essentially competing on two fronts. On one front you have people who don't consider the ethics of what they're eating, and on the other end you have people that care so much about animals that they don't eat animals at all.
This means that the market for ethical meat exists in a narrow band between these two groups, and may always struggle to reach critical mass. If, for instance, the ethical market is 10% but 5% of people are vegan, that's half your ethical market gone, meaning you lose many economies of scale, and also you lose an opportunity to grow, because the more concerned people become about animal welfare the more people will also become vegan or vegetarian, in one door, out the other. I'm not suggesting of course that vegans should eat meat in order to bolster the market, just that it's a tricky issue for this reason.
I think the video does a good job of trying to broaden that narrow band, by focusing on animal welfare rather than the body-count of animals. This might be a good approach. I can almost imagine a world where everyone is vegan, but I can much more easily imagine a world where 10% of people are vegan, but where 100% of the meat is ethically grown, which would be an immeasurably better situation than the one we have at present (until of course we consider the environmental impacts). So, although it's a tricky issue, it's worth pursuing.