YouTube video not showing

JavaScript
4

Try changing nextElementSibling to previousElementSibling.

e.g.

function onYouTubeIframeAPIReady() {
  const wrapper = cover.previousElementSibling;
  const frameContainer = wrapper.querySelector(".video");
  videoPlayer.addPlayer(frameContainer);
}

(function iife() {
  "use strict";

  function show(el) {
    el.classList.remove("hide");
  }

  function coverClickHandler(evt) {
    const wrapper = evt.currentTarget.previousElementSibling;
    show(wrapper);
    videoPlayer.play();
  }