The audio on a video are diferents tracks like:

1º Track - Game

2º Track- Microphone

3º Track - Voice chat (optional)

For content creators, this would be a blessing , having multiple audios not linked together because when I game, my in-game sound its too low and I can´t edit too much because my voice or music becomes distorted or even just wanting the in-game audio and no voice, without the struggle to remember to turn off my microphone.