mark-you-tube-videos-not-interested.js

(async () => {
  // Wait for the grid to load
  const waitForSelector = (selector) => {
    return new Promise((resolve) => {
      const interval = setInterval(() => {
        if (document.querySelector(selector)) {
          clearInterval(interval);
          resolve();
        }
      }, 100);
    });
  };

  await waitForSelector('#contents .ytd-rich-grid-renderer #button');

  // Get all buttons in the grid
  const buttons = document.querySelectorAll('#contents .ytd-rich-grid-renderer #button');

  for (const button of buttons) {
    // Click the button
    button.click();

    // Wait for the popup to appear
    await waitForSelector('.ytd-popup-container .ytd-menu-service-item-renderer');

    // Find the "Not interested" option and click it
    const notInterested = Array.from(document.querySelectorAll('.ytd-popup-container .ytd-menu-service-item-renderer'))
      .find(el => el.textContent.trim() === 'Not interested');
    if (notInterested) {
      notInterested.click();
    }

    // Wait a bit before moving to the next button
    await new Promise(resolve => setTimeout(resolve, 1000));
  }
})();

// Limit number to 20 max so we don't loop forever
const maxButtons = 20;
const limitedButtons = Array.from(buttons).slice(0, maxButtons);

for (const button of limitedButtons) {
  // Click the button
  button.click();

  // Wait for the popup to appear
  await waitForSelector('.ytd-popup-container .ytd-menu-service-item-renderer');

  // Find the "Not interested" option and click it
  const notInterested = Array.from(document.querySelectorAll('.ytd-popup-container .ytd-menu-service-item-renderer'))
    .find(el => el.textContent.trim() === 'Not interested');
  if (notInterested) {
    notInterested.click();
  }

  // Wait a bit before moving to the next button
  await new Promise(resolve => setTimeout(resolve, 1000));
}