First of all, great video. The story of Minas Ithil becoming Minas Morgul is an interesting story. I do have a nitpick. IIRC, King Elessar ordered that Minas Morgul be utterly destroyed. Minas Ithil would indeed be rebuilt after many years, but it would not be the original city.
As for King Earnur, it is possible that he was turned into a wraith, but I rather think he was tortured to death instead, if he didn't fall in single combat with the Witch King.