My gut feeling (if this person really is a NK soldier that was deployed to combat in Kursk) is that they are saying way more than they'd be privy to. The borderline poetic lines about how obvious Russia's losses and defeat is. The imagery of piles of burning bodies and machines topped off with the final statement affirming Russia's defeat. It is way too neat, way too performative.

I think it is likely that this is either totally fake, or that this statement is coerced/forced. Maybe I'm just conspiratorial, or cynical. But this is just way too "on the nose" for it to be a genuine hospital bed confession, in my opinion. There is nothing a North Korean boot on the ground could know, that Ukrainian and Western Intelligence wouldn't already know. It isn't like Kursk is behind a giant smoke screen. I call shenanigans.