For opus, try youtube-dl -f 251 <url> However, as I don't use opus, I don't know how prevalent it is. (Use `youtube-dl -F <url>` to see all available for

For opus, try youtube-dl -f 251 <url> However, as I don't use opus, I don't know how prevalent it is. (Use `youtube-dl -F <url>` to see all available formats.) EDIT to add: the above downloads only the audio, FWIW.