I'm not sure that I'm being all that skeptical, what I've said over and over is I've not yet seen evidence that they are actually there in spite of some folks in the internet showing me stuff which they say is evidence that doesn't qualify as being evidence.
Show me some evidence, real evidence, and I will say, say oh look North Koreans fighting with Russian in Ukraine.
Videos of troops in the background with accompanying narrative as to how they are North Koreans don't meet that bar.
I've seen this since I last posted about this:
This is better, although it's still not rising to the level of being evidence. Another thing about this is this is toned down a lot from the retric I was seeing last week.
12,000 troops is a token insofar as this war, however 12,000 is a number which could grow. But at this point I'm still wondering if this might be all or most fog of war and/or propaganda.