hoping that maybe @TeamYouTube can have the team do another review. From my (lay-person) perspective, I think what's tripping you up is your most popular videos have no commentary/facecam. (This means, it's difficult to tell it's your content vs anyone else's)
i think they would probably look more to the fact that they have a LOT of views (and therefore watch time). And I think they then make a decision based on the channel as a whole, regardless of if you're just trying to monetize a few vids.