>>62188963Upload the original to catbox first, then re-encode it to remove the audio for here, and finally rename the audioless version to:
"name[sound=files.catbox.moe%2F######.webm]", where name is whatever file name and ###### is the 6 character catbox link ending that you get when you upload a file (e.g. A1B2C3.mp3/wav/webm/etc.).