OMG they do really talk with their eyes!!
When Yun is offering the mic to whoever might be at his right, Min is looking at said person. But they don’t take Yun’s mic, so he looks at Changmin in a way that reminds me of a five years old when other kids bully him, so he turns to his mother saying “they don’t want to play with me, mommy. they’re being mean”.
Then they lock eyes and an hour of dialogue passed between their gazes in a matter of miliseconds, then Changmin’s eyes widen just a little bit and his expression turns from a confused look to a somewhat offended one, so he rises his eyebrow and looks at the other person, judging them for hurting Yunho’s feelings… And then Yunho smiles all pleased with himself.
All of that in like… two seconds.