I mean, it's the kind of thing only an all-round player like you would notice

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Someone who only plays the Dom path, like Stan or Maviarab, will see the scene where Dominique brags about her secret, unaware that almost the entire board knows about it, because they won't see Elena's part.
Someone who plays sub, like Silver, will see Elena's part, but won't understand its full meaning because he won't see the scene in which Dominique brags and reveals her secret to Dom Kane.
By the way, Kane's face in the scene with Dominique screams "rescue me" and "I'm being held captive"

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Just look at his sad, unhappy face, he doesn't want to be there!