YouTuber uses international marathon to infiltrate North Korea: ‘I left with 1,000 more questions’

When North Korea opened a marathon up to international competitors, one YouTuber realized it was his only chance to get himself — and his camera — inside the totalitarian country. "I'm not a runner, but they told me you have to be there in a month, and I made all the preparations and made it happen," Harry Jaggard told The Post. "I've been making YouTube videos going to less visited areas of the world for a while now, and North Korea has been on my radar for years." The experience, he said, was bizarre: "My tour guide said that you'll…