I think a big difference is how seeing it happen in real life is much more impactful than on a video.

I grew up around butchering animals, and even got to visit a nearby family-owned slaughterhouse on occasion, for me slaughtering and butchering animals is something that I'm much more aware of due to these experiences, I've even been taught how to slaughter animals, and though I would never advocate to have everyone who wishes to eat meat slaughter an animal themselves, I think it's absolutely important to see the process in person and not just on video.

Something that happens a lot in my experience is that specific animal parts are considered "gross", entrails and such are usually the most common parts considered as such. That's probably the easiest way to figure out if someone is aware of what butchering means or not, no, considering them gross is not directly a problem, but going all "eek" and stuff is a great way of telling me that the other person is ignorant of the meat industry.