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yt-skipper.js

(($adsContainer, skipBtnClass, addOverlayClass) => {
  const handler = (mutationsList, observer) => {
    mutationsList.some((mutation) => {
      if (mutation.type !== 'childList') return;

      const $btn = $adsContainer.querySelector(skipBtnClass);
      if ($btn) {
        $btn.click();
        return true;
      }

      const $addOverlay = $adsContainer.querySelector(addOverlayClass);
      if ($addOverlay) {
        $addOverlay.remove();
        return true;
      }
    });
  };

  const observer = new MutationObserver(handler);

  observer.observe($adsContainer, {
    childList: true,
    subtree: true,
  });
})($('.video-ads.ytp-ad-module'), '.ytp-ad-skip-button-slot', '.ytp-ad-overlay-slot');