How does Youtube piracy protection works?

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Menticol

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I've uploaded a home video with an unlicensed music track. I was not suprised when I got the message

"This video contains an audio track that has not been authorized by WMG. The audio has been disabled. More about copyright"

Anyway, an interesting part of it is how they can compare the music track (mixed with ambient sounds) with the original sample? Must be a very powerful software

The question is, they state that (theoretically) a home video showing a dinning family can be counfused with a scene of "The godfather" (and provided a form to be filled in that case)

Automated video analysis reached that tech level??? MAN! that's absurd!
 
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A hidden digital signal is encrypted into the the music file.

I believe this sort of technology has previously used in the cold war to transmit secret data over the broadcast band.
 
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