find in section.php:
'video_mute' => true,
and set to :
'video_mute' => false,make a copy of sections.php edit it (see above) – and upload it to your child-theme/shortcodes folder.
acitvate child-theme shortcodes replacement by:
add_filter('avia_load_shortcodes', 'avia_include_shortcode_template', 15, 1);
function avia_include_shortcode_template($paths){
$template_url = get_stylesheet_directory();
array_unshift($paths, $template_url.'/shortcodes/');
return $paths;
}Here on Full-Width and Fullscreen Slider it is a bit different – because we could have more than one video on the slider. To have no buttons on the Images – Button has to be in li-element itself.
The code below will be added to functions.php of your child-theme
Give a custom class to the Full Slider: mute-button
add_action('wp_footer', 'mute_unmute_video_slide');
function mute_unmute_video_slide(){
?>
<script type="text/javascript">
(function($) {
$('.mute-button .avia_video').closest('.avia-slide-wrap').prepend('<div class="custom-mute"></div>');
$('.mute-button .avia_video').on('av-mediajs-loaded', function() {
var video = $(this).mediaelementplayer();
video[0].setMuted(true);
$('.avia-slide-wrap').on('click', '.custom-mute', function() {
if(video[0].muted === true) {
video[0].setMuted(false);
video[0].setVolume(0.8);
} else {
video[0].setMuted(true);
}
});
});
$('.avia-slide-wrap').on('click', '.custom-mute', function() {
$(this).toggleClass("icon-sound-on");
});
})(jQuery);
</script>
<?php
}Upload two buttons ( as you like ) f.e.
and 
this comes to quick css
.custom-mute {
display: block;
background-image: url('/wp-content/uploads/mute.png');
background-size: cover;
width: 120px;
height: 120px;
position: absolute;
bottom: 9%;
right: 5%;
z-index: 50;
}
.custom-mute:hover {
opacity: 0.5;
}
.icon-sound-on {
background-image: url('/wp-content/uploads/unmute.png');
}
Here is a solution vor Video-Background on color-sections: Link
