Well, just because SBS said they're two different person then it means viewers will accept & see them as such.…
yup agreed, to me, it just seems like a marketing ploy, even the title of the video seems like it’s trying to pull viewers/make/entice people (into) watch(ing) the drama. I just watched the video and it just shows clips(spoilers) of the drama. It shows him traveling back to 2010 and seeing student yoon tae yi and his mom together in the same timeline, making us believe that they are different people, BUT they were also in the same timeline when the yr 2050 mom travelled back to 1992 to the home of that Dr. to get back the book of prophecy, and the Dr’s daughter was young yoon tae yi, while the mom was the future yoon tae yi, who traveled back to the past, which was how baby jingyeom came to being. And Hotel Alice does prove that the time travelers are traveling back in time to meet their younger selves, which also meant the mom supposedly SHOULD have a younger self, which is the Dr’s daughter, except for the age differences, assuming the young yoon tae yi was like 6-8 years old in 1992, she would be more than 60 years old in the year 2050…which probably doesn’t make sense, since she most likely did not wear the ear thing that makes the time traveler look young.