Delete All YouTube Watch Later and Liked Videos

Go to the page and run this in the console.

Sometimes after completion, if you refresh the page, there still might be some videos. This is a YouTube bug. Run it multiple times until you're satisfied.

;(async () => {
  // Function to wait for an element to be present in the DOM
  const waitForElement = (selector, timeout = 10000) => {
    return new Promise((resolve, reject) => {
      const element = document.querySelector(selector)
      if (element) {
        resolve(element)
      } else {
        const observer = new MutationObserver((mutations) => {
          const element = document.querySelector(selector)
          if (element) {
            resolve(element)
            observer.disconnect()
          }
        })
        observer.observe(document.body, {
          childList: true,
          subtree: true,
        })
        setTimeout(() => {
          reject(new Error(`Element ${selector} not found`))
        }, timeout)
      }
    })
  }

  // Function to scroll to the bottom of the page until the number of list items doesn't change
  const scrollToBottom = async () => {
    let previousCount = 0
    let currentCount = 0

    while (true) {
      previousCount = currentCount
      currentCount = document.querySelectorAll('ytd-playlist-video-renderer').length

      window.scrollTo(0, document.documentElement.scrollHeight)
      await new Promise((resolve) => setTimeout(resolve, 2000))

      if (currentCount === previousCount) {
        break
      }
    }
  }

  // Function to scroll to the very top of the page
  const scrollToTop = () => {
    window.scrollTo(0, 0)
  }

  // Function to remove videos from the playlist
  const removeVideos = async () => {
    // Wait for the playlist items to load
    await waitForElement('ytd-playlist-video-renderer')

    // Find all ytd-playlist-video-renderer tags
    const playlistItems = document.querySelectorAll('ytd-playlist-video-renderer')

    // Iterate over each playlist item
    for (const item of playlistItems) {
      // Click the yt-icon-button within the playlist item
      item.querySelector('yt-icon-button').click()

      // Wait for the dropdown menu to appear
      await waitForElement('tp-yt-paper-listbox')

      // Find the "Remove" option and click it
      const removeOption = Array.from(document.querySelectorAll('tp-yt-paper-listbox yt-formatted-string')).find(
        (option) => option.textContent.includes('Remove')
      )
      removeOption.click()

      // Wait before proceeding to the next playlist item
      await new Promise((resolve) => setTimeout(resolve, 500))
    }
  }

  // Main function to handle scrolling and video removal
  const main = async () => {
    await scrollToBottom()
    scrollToTop()
    await removeVideos()
    alert('All videos have been removed from the playlist.')
  }

  await main()
})()