How to present a YouTube embed video with sound muted with HTML?

To present a YouTube embed video with sound muted with HTML, we set the mute query parameter to 1.

For instance, we write

<iframe
  src="https://www.youtube.com/embed/uNRGWVJ10gQ?rel=0&amp;autoplay=1&mute=1"
  width="560"
  height="315"
  frameborder="0"
  allowfullscreen
></iframe>

to set the mute query parameter to 1 in the video URL to mute the video embedded with the iframe.