Download video/audio from YouTube quickly via SaveFrom

Adds buttons in userscript manager on YouTube videos to go to SaveFrom and get video or audio, and automatically selects and downloads the highest quality video/audio on SaveFrom links

当前为 2023-12-08 提交的版本，查看最新版本。

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换行

// ==UserScript==
// @name        Download video/audio from YouTube quickly via SaveFrom
// @namespace   https://github.com/fxolan/userscripts
// @version     1.0
// @description Adds buttons in userscript manager on YouTube videos to go to SaveFrom and get video or audio, and automatically selects and downloads the highest quality video/audio on SaveFrom links
// @match       https://en.savefrom.net/*
// @match       https://www.youtube.com/*
// @exclude     https://www.youtube.com/feed/*
// @exclude     https://www.youtube.com/channel/*
// @grant       GM_registerMenuCommand
// @homepage    https://github.com/fxolan/userscripts
// @license     The Unlicense
// @supportURL  https://github.com/fxolan/userscripts/issues
// ==/UserScript==

(function() {
  'use strict';
  const url = window.location.href;
  const saveF = 'https://en.savefrom.net/';

  function overrideTimeout() {
    const originalSetTimeout = window.setTimeout;
    window.setTimeout = function(callback, delay) {
      return originalSetTimeout(callback, 1);
    };
  }

  function getHighestQuality() {
    // Get all the video download links on the page
    const links = document.querySelectorAll('.main > div.link-group > .ga_track_events.subname.link-download.link');

    let highestQuality = 0;
    let highestQualityLink = null;

    // Iterate through the video download links
    for (let i = 0; i < links.length; i++) {
      const link = links[i];
      const words = link.innerText.split(" ");
      const lastWord = words.pop();
      if(localStorage.getItem('format')) {
        if(link.innerText.startsWith('MP4')) {
          if (parseInt(lastWord) > highestQuality) {
            highestQuality = parseInt(lastWord);
            highestQualityLink = link;
           }
        }
      }
      else {
        if(link.innerText.startsWith('Audio')) {
          if (parseInt(lastWord) > highestQuality) {
            highestQuality = parseInt(lastWord);
            highestQualityLink = link;
          }
        }
      }
    }
    highestQualityLink.click();
  }

  function dlV() {
    window.open(saveF + url, '_blank').focus();
  }

  function dlA() {
    localStorage.setItem('format', 'false');
    window.open(saveF + url, '_blank').focus();
  }

  if(url.startsWith(saveF)) {
    overrideTimeout();
    const intervalId = setInterval(function() {
      if (document.querySelector('.links')) {
        clearInterval(intervalId);
        getHighestQuality();
      }
    }, 200);
  } else {
    localStorage.setItem('format', true);
    GM_registerMenuCommand('Download Video', dlV);
	  GM_registerMenuCommand('Download Audio', dlA);
  }

})();