// Set up the playerconst playerInstance = jwplayer('player').setup({  playlist: 'https://cdn.jwplayer.com/v2/media/8L4m9FJB'});
const buttonId = 'download-video-button';const iconPath = 'assets/download.svg';const tooltipText = 'Download Video';
// Call the player's `addButton` API method to add the custom buttonplayerInstance.addButton(iconPath, tooltipText, buttonClickAction, buttonId);
// This function is executed when the button is clickedfunction buttonClickAction() {  const playlistItem = playerInstance.getPlaylistItem();
  // Create an anchor element  const anchor = document.createElement('a');
  // Set the anchor's `href` attribute to the media's file URL  const fileUrl = playlistItem.file;  anchor.setAttribute('href', fileUrl);
  // set the anchor's `download` attribute to the media's file name  const downloadName = playlistItem.file.split('/').pop();  anchor.setAttribute('download', downloadName);
  // Set the anchor's style to hide it when it's added to the page  anchor.style.display = 'none';
  // Add the anchor to the page  document.body.appendChild(anchor);
  // Trigger a click event to activate the anchor  anchor.click();
  // Remove the anchor from the page, it's not needed anymore  document.body.removeChild(anchor);}