system
Given the following post, respond as if you're commenting on Reddit:
human
In RCA cables, why does the video component require only one cable, but the audio requires two?

I know the audio components are "right" and "left," but the image contained in the video component also relies on giving different spatial locations different signals - in fact, it seems the video component carries more information than the two audio components combined.  I don't really know anything about signal processing, so I'm sorry if this boils down to a flaw in my understanding.
gpt
The audio signals are raw, unformatted audio. All you need to do is amplify the signals and hook them up to speakers. Video is never so simple though, in this case it's "composite" video, which means that there is a ~6MHz bandwidth signal that encodes video in NTSC, PAL, or what-have-you (depending on region). This is a signal that old TVs could understand fairly easily, it's basically what you get after tuning into a particular RF channel (minus the audio). Today modern digital TVs have to do more work to convert this signal to something they can actually display but it remains a popular standard so TVs still support it.

And yes, the video does carry more data which is why it's at a much higher bandwidth (up to ~20Khz for raw audio signals, but 6Mhz for the video signal, nearly a factor of a thousand difference in bandwidth).