I think he was referring specially to the counts. Unless I'm wrong, I think it's sort of how they do it, but only the numbers they can confirm, which is why lots of people think it could be a WHOLE LOT more.
Like if the video guy says 200, but no one can actually confirm on the Ukraine side, then they would go to the social media chatter from the Russians about the incident and try to determine what number goes into the count for that event.
Again, I could be way off.