I don't think that was the non-verbal communication he was referring to.

I was hoping it wasn't body language, because that's more of a detriment to the meeting, since it's completely subjective. We have an exec that constantly interrupts meetings to ask people about their body language, but the bad part is that he's almost always interpreted it incorrectly, and he proceeds to make mountains out of molehills and waste everyone's time (often while making people extremely uncomfortable). Unless it's a sales presentation where a professional salesperson needs to "read the room", we're better off without cams.