revision:
When present, it specifies that the audio output of the video should be muted.
The muted attribute can be used on the following elements: <video> and <audio>
<video muted></video>
<audio muted></video>
To get sound back, click the mute button (to unmute), or remove the muted attribute.
<video style="margin-left: 3vw;" width="320" height="240" controls muted>
<source src="../../pics/Wuzhen-20-10_02.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>
<audio style="margin-left: 3vw;"" controls muted>
<source src="../../pics/horse.wav" type="audio/wav">
Your browser does not support the audio element.
</audio>