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> Posting a video demo probably isn't a great idea for this kind of thing. I'm sure some sicko could have figured this out just from the sound the locks make.

What does this mean?

They mean someone who's extremely passionate about this could identify the car brand or exact model in question just by listening to the sound the lock makes from the posted video. You know, like the experts who can identify a wine by smelling it, or a violin just by listening to it.
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