Adicione esse script para abrir a transmissão da copa em picture in picture no Safari.

picture-in-picture.js

(function () {
  var video = document.querySelector('video:not([title="Advertisement"])')
  if (!video.webkitSupportsPresentationMode || typeof video.webkitSetPresentationMode !== 'function') {
    console.error('Esse código só funciona no Safari!')
    return
  }

  var scoreX = document.querySelector('.placar__equipes')
  
  var button = document.createElement('button')
  button.innerHTML = 'Abrir Picture-in-Picture'
  button.style.cssText='font-size: 1.3rem; margin:0 auto; display:block; padding: 0.7em 1.25em; border: 0; background-color: #006dcc; color: #fff; cursor: pointer;'
  scoreX.parentNode.insertBefore(button, scoreX.nextSibling)
  
  button.addEventListener('click', function(event) {
    video.webkitSetPresentationMode('picture-in-picture');
  });
})();