Unsubscribe from YouTube channels in bulk on target page https://www.youtube.com/feed/channels

youtube-unsubscribe-all.js

javascript:(() => {
  const timeout = 500;
  const buttons = document.querySelectorAll("[aria-label^='Unsubscribe from']");

  for(let button of buttons) {
    setTimeout(() => { 
      console.group(button.attributes['aria-label'].value);

      setTimeout(() => { button.click(); }, timeout);

      setTimeout(() => {
        document.querySelector('#confirm-button').click();
      }, timeout);
  
      console.groupEnd();
    }, timeout);
  }
})();