Nobody cares about micing a stage, we are discussing spying. Its you that wants to claim stage production is the same as spying to justify your claims that its too expensive and can't be done with the cheap mics in a TV.
They are mounted at the top of the screen on my laptop and on macbooks IIRC. The speakers are at the bottom on mine but I don't know where they are on the macbook. Te positioning is pretty much irrelevant anyway.
Just because you don't know how it works doesn't mean it doesn't work! Get a life and argue about something you know about. I'm sure someone here cares about how you would mic up a stage to get maximum sound quality so they can compress the hell out of it.