By setting the
ac_none in URLs), you can strip the audio channel from the video, serving it without sound.
You can also chain another audio file as an overlay to replace the video’s original audio.
The original video file (with audio) -
The muted video -
The video with a different (and objectively better) audio.
The song is actually larger, but we cut it to its first 13 seconds with the
eo_ in the URL) parameter to match the video’s length.