Youtube serves the audio and video separately; yt-dlp (the successor to youtube-dl) can download only the audio part, so there isn't any extraction necessary.
Honestly, I don't understand "piracy" much anymore -- almost everything folks want is legally available on a streaming service for cheap or no-charge. If something has been censored or banned (or the owner refuses to sell it anymore), then that's a different story, but legal services are cheap and easy now.
Honestly, I don't understand "piracy" much anymore -- almost everything folks want is legally available on a streaming service for cheap or no-charge. If something has been censored or banned (or the owner refuses to sell it anymore), then that's a different story, but legal services are cheap and easy now.