This seems to be an unedited version of that video with sound. I don’t speak Korean so I can’t validate it against the article, but the bbc has a reputation for being credible so I’m inclined to believe it. https://youtu.be/GcUe4O_53_0
As for the organization, the only mentions I’ve found are almost all about this, with one mention of it being a think tank in South Korea, which is weirdly little information.
Obsfucation can help stimey scripts. I saw using a non-standard port mentioned.
You can also setup a reverse proxy to deliver a different, empty site to a different dns entry by default. Use either a completely separate (as opposed to multidomain) cert for each, or a wildcard cert.
Jellyfin also supports using a custom path, instead of delivering at the root. Your reverse proxy would need to be configured accordingly.