script to replace video bg with an image

<script>
jQuery(function(){
    if( navigator.userAgent.match(/Android/i) ||
        navigator.userAgent.match(/webOS/i) ||
        navigator.userAgent.match(/iPad/i) ||
        navigator.userAgent.match(/iPhone/i) ||
        navigator.userAgent.match(/iPod/i)){
            jQuery('video').remove();
            jQuery('.pix_overlay_pattern').before(
                '<div class="pix_slide" data-position="fixed" data-top="0" data-bottom="not">'+
                '<div data-src="THE_COMPLETE_URL_OF_YOUR_BACKGROUND_IMAGE"></div>'+
                '</div>'+
                '<div id="pixwall_target" data-position="fixed" data-top="0" data-bottom="not"></div>'
            );
            jQuery('.pix_slide').pixwall();
        }
});
</script>