Alt attribute on play and load icons

For validation purpose you should add the alt attributes to your pre-loaded play and load icons.

In the frontend.js file within the function triggerPlayload() you should add something like .attr(‘alt’, ‘…’):

/**
   * Trigger the play / load icon (and preload them).
   */
  function triggerPlayLoad() {
    // preload images
    if (bgState === undefined) {
      [fvpdata.playicon, fvpdata.loadicon].forEach(function(val) {
        $('body').append( $('<img />', { src: val }).hide().attr('alt', '...') );
      });
    }

    // trigger image
    bgState = bgState === playBg ? loadBg : playBg;
    $loader.css({ backgroundImage: bgState });
  }

https://wordpress.org/plugins/featured-video-plus/