Userscript to download tiktok videos shown in the browser, for ultimate memeing purposes. :)

download_tiktok_videos.user.js

// ==UserScript==
// @name         Download Tiktok Videos
// @namespace    https://tiktok.com/
// @version      0.1
// @description  Adds download links for videos, even on private accounts.
// @author       Evan Straw
// @include     http://*.tiktok.com/*
// @include     https://*.tiktok.com/*
// @grant        none
// ==/UserScript==

(function() {
    setTimeout(addDownloadLinks,100);
})();

function getVideoElements(){
    return document.getElementsByTagName("video");
}

function getNumVideos(){
    return getVideoElements().length;
}

function isPostPage(){
    return window.location.pathname.startsWith("/p/");
}

function makeDLLink(url){
    let linkElement = document.createElement("A");
    linkElement.href = url;
    linkElement.innerText = "Download Video";
    linkElement.target = "_blank";
    linkElement.style = "padding: 10px;font-size:2em;font-weight:bold;color:red;";
    return linkElement;
}

function addDownloadLinks(){
   if(getNumVideos() > 0){
       let videoElements = getVideoElements();
       let video = videoElements[0];
       let videoURL = video.src;
       let link = makeDLLink(videoURL);
       let mainBody = document.getElementById("mainBody");
       mainBody.appendChild(link);
   }
}