Mute/Unmute Button on Videobackground in Color-Section

add_action('wp_footer', 'mute_unmute_background_video');
function mute_unmute_background_video(){
?>
<script type="text/javascript">
(function($) {  
    $('.mute-button').prepend('<div class="custom-mute"></div>');
    $('.avia_video').on('av-mediajs-loaded', function() { 
      var video = $(this).mediaelementplayer();
      video[0].setMuted(true);
      $('.mute-button').on('click', '.custom-mute', function() {
        if(video[0].muted === true) {
          video[0].setMuted(false);
          video[0].setVolume(0.8);
        } else {
          video[0].setMuted(true);
        }   
      });
    });
    
    $('.mute-button').on('click', '.custom-mute', function() {
      $(this).toggleClass("icon-sound-on");
    });
})(jQuery);
</script>
<?php
}