src=”https://www.youtube.com/embed/gD__DOyYG1U?rel=0&autoplay=1&mute=1″
Add “&autoplay=1&mute=1” to “?rel=0” to autoplay and mute.
.videoWrapper {
position: relative;
padding-bottom: 56.25%;
/* 16:9 */
padding-top: 25px;
height: 0;
}
.videoWrapper iframe {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
}
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