OMG, the video you've attached was quite spooky for me, cuz I'm a chicken haha. There's lots of homonym in Korean actually, Maybe I should write some interesting homonyms in Korean someday. Like '배' or '눈' or.. that kind of things. Thank you for offering such an interesting topic.

The very first '가위 눌림' I've experienced was, I think when I was about 21 years or so. After staying up all night for work, I fell onto the bed, and after about 1-2 hours or so, I felt like, my whole body was paralyzed. And the '가위눌림' continued day day. Fortunately, a ghost never didn't come up, but it was really scary to me, so I quit my all-night work job. After quitting the job, the '가위눌림'had gone, and I felt really relieved.

오늘도 정말 재미있는 이야기였어요 ㅎㅎㅎ 감사합니다!