Your questions are totally irrelevant. They are a red herring. That's why I'm not going to answer them.
I not only was not part of the design team, I have never worked for Ford Motor Company in any capacity yet I have detailed technical knowledge of how my car works.
You tell me what logical inference can be made from this fact.
Again, I dare you to take a college class and cite Wikipedia in your bibliography as "proof" of anything. Hell, Wikipedia
themselves tell you to tread carefully:
Reliability of Wikipedia Wikipedia is Not a Reliable Source Drop a video into your NLE and tell us what you see. Better: do as Mario suggested and take a silent video, "convert" it to audio and tell us what happens.
Fact: In your NLE you can separate the video from the audio. You can get rid of one or the other, make changes to one independently of the other and/or move them or parts of them in relation to one another.
Fact: when rendering your project or transcoding it you can independently choose the video and the audio codec.
You tell me what the obvious logical conclusion is