We actually extract audio signals from video signals.

实际上我们从视频信号中提取了音频信号。

To make things more confusing, some USB-C cables can be used with a second monitor, while others aren't capable of sending a video signal at all.

让人更加疑惑的是，一些 USB-C 数据线可与第二台显示器一起使用，而其他数据线则完全无法发送视频信号。

Once the video signal leaves the control area it heads out to Main Street and you can see there is a projector sticking out of a window.

一旦视频信号离开控制区，它就会流向主街，你们可以看到投影仪从窗户伸出来。