Sort the visible list of videos by views

youtubeSort.js

function youtubeSort () {
  const channel = document.querySelector('#channel-title').textContent

  const videos = [...document.querySelectorAll('#items > ytd-grid-video-renderer')]
  .map(item => {
    const metadataLine = item.querySelector('#details #meta #metadata-line')
    const metadataViews = metadataLine.querySelector(':nth-child(1)').textContent
    const metadataDate = metadataLine.querySelector(':nth-child(2)').textContent

    const videoTitle = item.querySelector('#details #meta #video-title')

    const href = videoTitle.href

    const title = videoTitle.textContent

    const humanizedDate = videoTitle.getAttribute('aria-label')
      .replace(`${title} by ${channel} `, '')
      .split(' ').slice(0, -2).join(' ')

    const humanizedViews = videoTitle.getAttribute('aria-label')
      .replace(`${title} by ${channel} `, '')
      .match(/([0-9,]+) views/)[1]

    const views = Number.parseInt(humanizedViews.replace(',', ''), 10)

    return {
      metadataViews,
      metadataDate,
      href,
      title,
      humanizedDate,
      humanizedViews,
      views,
    }
  })
  .sort((a, b) => {
    return b.views - a.views
  })

  return videos
}

Go to a channel's video list and scroll down until you've loaded enough videos. Then copy the above function and run copy(youtubeSort()).