YouTube Search and Watch History Purge

youtube-history-purge.js

/*
  Tired of YouTube giving you the same recommendations all the time?
  As it turns out, the recommendations are calculated directly from your search and watch history.

  Instructions:
  1. Visit
    youtube.com/feed/history/search_history
  or
    youtube.com/feed/history
  2. Scroll down on the page so there are many results visible.
  3. Open up dev tools.
  4. Select "Sources", then "Snippets" (in the same menu as "Page" on the left).
  5. Select "+ New snippet". Name the snippet whatever you please.
  6. Paste this script into the box on the right. Save the script.
  7. Run the script using the play button on the bottom right.
  8. Go the console tab and run the command:
    removeSearch(searchTerm)
  or
    removeWatch(searchTerm)
  depending on which page you are on. Replace "searchTerm" with your search term.
  9. Go to the other page (search or watch) and do the same with your search term.
  The script will delete any searches that match the search query or videos that match the title/description.
  Now the recommendations will no longer use these entries for its algorithm.
*/

let searchTerm

const ntol = ls => Array.from(ls)

const removeEntry = (ls, searchTerm) => {
  let filteredResults
  let deleteButtons
  
  filteredResults = ls.filter(x => x.textContent.toUpperCase().indexOf(searchTerm.toUpperCase()) > -1)
  deleteButtons = filteredResults.map(x => x.parentNode.querySelector('button'))
  deleteButtons.forEach(x => x.click())
  return deleteButtons
}

const removeWatch = searchTerm =>  {
  let matchingTitles
  let matchingDescriptions

  matchingTitles = ntol(document.querySelectorAll('h3.title-and-badge'))
  removeEntry(matchingTitles, searchTerm)

  matchingDescriptions = ntol(document.querySelectorAll('#description-text'))
  removeEntry(matchingDescriptions, searchTerm)
  return {matchingTitles, matchingDescriptions}
}

const removeSearch = searchTerm =>  {
  let searchList
  
  searchList = ntol(document.querySelectorAll('a.ytd-search-history-query-renderer'))
  removeEntry(searchList, searchTerm)
  return searchList
}