What audio quality does YouTube actually stream? (and how to spot a fake 320kbps MP3)

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Disclosure: I run YT320MP3, a free YouTube to MP3 converter. Everything below applies to any converter, including mine, and you can check it yourself with free tools. Almost every YouTube to MP3 site advertises "320kbps". It sounds like a quality promise. It is really a setting on the output file — and the output can never be better than what YouTube sends.

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