I think I remember reading something about how the network inside NK was basically running off one (edit: a few) IP addresses with an enterprise local network.
I think that was posted on HN, I'll try to find the link.
edit: was it this one? https://news.ycombinator.com/item?id=12123888
Re:North Korea 'Netflix' device unveiled
by throwaway049 on Tuesday August 23, 2016 @08:30AM
(#12343133)
From further down the article, this implies more than one address:
In May security researcher Doug Madory discovered a social network - resembling a crude clone of Facebook - on a North Korean internet address.
"I don't believe it was intended to be accessible from outside North Korea," Mr Madory told the BBC.
I wonder how much telecom infrastructure suitable for streaming is there in NK, outside central Pyongyang. Would that be basically a glorified hotel entertainment system?