Probably the most miraculous thing about the video (you know, other than the miracle that is the beginning of a new life) is that the Wizarding World appears to be empty save the expecting couple. While it may seem that the couple got some kind of special privilege to enter the park while it was empty, that’s not the case. This question popped up in the comments, and Grace responded with a video saying that they entered the park as soon as they could and filmed around other people. According to her, the early birds tend to head to the rides, and they tried to film in other parts of the park where there were less people. The clever couple must be Ravenclaws.