Script parallax.js + script inicializador

<script src="https://cdnjs.cloudflare.com/ajax/libs/parallax/3.1.0/parallax.min.js"></script>

<script>
// Seccion 1
jQuery(function($){
  $( ".img-mov-01" ).attr( "data-depth", "0.1" );
  $( ".img-mov-02" ).attr( "data-depth", "0.3" );
  $( ".img-mov-03" ).attr( "data-depth", "0.4" );

  var parallaxMouseScroll = $('.ov-parallax-1').get(0);
  var parallaxInstance = new Parallax(parallaxMouseScroll);
});
</script>