By the way, whenever I want to download the audio from a YouTube clip for a song I don't already have, I use a free program called "4K YouTube to MP3".
Easily available on the web. All you have to do is open the song in YouTube, click on "share", and copy the link to the "4K YouTube To MP3" program.
It converts the audio to MP3 and brings along the artist and song title. I've been using it for years with no problems.