It's unusual for non-US dubs to hold the weirder beliefs, so this is a
new one for me. She also said that the end is very close now and that
things are a foot with North Korea; it's clearly the king of the north.
Of all the sects on Earth, the last one I'd go to for insight into biblical prophecy is the WTBTS. What it has managed to pull over the heads of its members in regard to Armageddon is a shame, but it's not all the leadership's fault. The Jehovah's Witnesses no longer read their Bibles except to look up citations as encouraged. I haven't met any of them that is aware of what the Bible says about Armageddon.
The Bible is very Jerusalem-centric in its prophetic outlooks. It doesn't really cover China, Korea, India, the United Kingdom, most of Africa, the Polynesian islands and...well, you get the picture.
If your aunt wants to know about the King of the North, Gog, Magog, the Beast, the False Prophet and the other prophetic players of the Bible, she should not look first to YouTube, the Internet or the Governing Body. She should go find out what the Bible says, then look for information that supports it or refutes it.
The best books I've seen are Joel Richardson's The Islamic Antichrist and The Mideast Beast. Both are outstanding primers on end-time prophecy and portray Armageddon biblically. Joel Richardson's website also is worth checking out but, again, only after first reading what the Bible says. If it's especially daunting, go to carefully selected sources first, then see if it's what the Bible teaches. In the case of the Watchtower Society, Armageddon is painted as a worldwide conflagration. It is not. Rather, it takes place in a specific part of the Middle East. Watchtower points out that Daniel and others say it would involve "all nations." But Daniel also used that term to apply to the kingdoms of some of the earlier empires that were prophesied. Alexander the Great came the closest to conquering all nations of the earth, but he hadn't conquered Italy, what is now Britain, Norway, China or any of the nations in the Western Hemisphere. It's not that he didn't know nations existed outside the bounds of his knowledge; it's just that they didn't pertain to his writings. He tended towards hyperbole and who his audience was.