The traditional street is an assortment of meats that go from the traditional "pastor" meat (which is commonly beef roasted with pineapple) to more exotic like the eye or udders of bovines; all this is folded inside a small, soft tortilla that fits in the palm of an average adult person, and it's accompanied with celery, onion, lemon juice, and your pick of home made hot sauce. We also have the "made at home while you eat" variety that's just placing whatever you're gonna eat folded inside a soft but average sized tortilla, because why not.
What Graha eats in the trailer is way closer to a quesadilla. The tacos al pastor from the game are made of flour tortilla, which makes them closer to "gringas" (yes, it's the name of a food, it's derogatory, and I'm sorry my country decided to name it that way). One would say it's a nitpick (and it is), but my mexican friends who play FFXIV were annoyed at the fact that, yet again, they got the tortilla and the presentation wrong, even though the Pastor part is spot on.
I'm not making this up, we're... picky about the representation of tacos in media, it didn't use to be that huge of a deal but nowadays getting tacos wrong in foreign media is like blasphemy. It's kinda like how a dark joke can be funny at first, but keep repeating it and it becomes offensive. Except American's aren't doing it on purpose... it's like how everyone in the world loves Pizza, until you travel to Italy and say "what the ever loving fudge is this?".