<div class="video">
<video controls="false">
	
	
	<p>
	désolé mais votre navigateur ne supporte pas les vidéos
	</p>
<span id="muteButton"> mute </span>
</video>
</div>

    $('#muteButton').click(function() {
        var video = $('#myVideo')[0];
        if (video.muted) {
            video.muted = false;
            $(this).text('Mute');
        } else {
            video.muted = true;
            $(this).text('Unmute');
        }
    });