I didn't watch the video. My conection is slow. But the reason MANY Gentile Peoples reject pork has two reasons.
1- Some probably copied Kosher laws, either ignoring or voluntarily overlooking the fact that Kashrut is not an obligation for Gentiles. Unlike Shabbat and other mitzvot which are strictly forbidden to Gentiles, Kashrut is permitted to us on condition we keep it voluntarily and don't proclaim it as a mitzvah for us, but it's not binding.
2- The distinction between Kosher and non-Kosher animals was taught to Noah, the father of all current Mankind relating to sacrifices (for the time Gentiles used to offer them) and some Peoples extended the custom also to animals slaughtered just for food.
There are records of pork tabooes in Scotland, Tibet and many other regions.