Greasemonkey / Tamper Monkey script for Porn Hub

Finding no working downloader at userscripts or other repositories for Greasemonkey scripts I had to write my own. This provides links instead of video to the video and can download videos that are set as non downloadable by the user or pay to download. Here it is:

// ==UserScript==
// @author      Trip
// @version     0.2
// @name        Access All
// @description Enabled Downloading of mvideos that you are not meant tom be able to
// @date        2019 July 4
// @include     *pornhub.com/view_video.php*
// @run-at      document-idle
// @grant       none
// @license     Public Domain
// @icon        https://gmgmla.dm2301.livefilestore.com/y2pAKJYeZAp4tG23hG68x1mRuEUQXqb1MxdLbuqVnyyuHFxC7ra5Fc-tfq6hD-r9cNnVufT3egUHaimL547xDlESrOVmQsqNSJ5gzaiSccLYzo/ExtendPornHub-logo.png
// @namespace   649b97180995e878e7e91b2957ef3bbee0f840a0
// ==/UserScript==

(function() {
    'use strict';
    console.log("Access All Running");
    function parseScript(script_object)
    {
        if (script_object.innerText == null || !script_object.innerText.trim().startsWith("var flashvars"))
        {return null;} //typeof script_object == 'undefined' ||
        var str=script_object.innerText.trim();
        str=str.substring(str.indexOf("{"));
        var str_end = str.indexOf("var player_mp4_seek = \"ms\";");
        str=str.substring(0,str_end);
        str_end = str.lastIndexOf(";");
        str=str.substring(0,str_end);
        var json = null;
        try {
            json = JSON.parse(str)
        } catch (err) {
            location.reload();
            return null;
        }
        if (json!==null)
        {return json};
        return null;
    };

    function make_links(el,json)
    {
        var out ="";
        for (var i=0;i<json.mediaDefinitions.length;i++)
        {
            if (json.mediaDefinitions[i].videoUrl=="")
                {continue;}
            var a = document.createElement('a');
            var linkText = document.createTextNode(json.mediaDefinitions[i].quality);
            a.appendChild(linkText);
            a.title="Qal";
            a.href = json.mediaDefinitions[i].videoUrl;
            //a.download='Test.mp4' //html5
            el.appendChild(a);
            el.appendChild(document.createElement("br"));
        }
        return out;
    }

    //var all_doc;
    //all_doc = document.body.innerHTML;
    //console.log(all_doc);
    var scripts = document.scripts;
    var json = null;
    for ( var i=0; i<scripts.length; i++)
    {
        json=parseScript(scripts[i]);
        if (json!==null)
            {break;}
    }
    var div = document.createElement("DIV");
    //div.style="position: absolute; visibility: visible; left: 20px; top: 300px; height: 75px; width: 150px; z-index: 200;"
    div.style="display: block; visibility: visible; left: 10px; bottom: 10px; height: 75px; width: 30px; margin-left: 30px; z-index: 200;"
    var out = make_links(div,json);
    //replace video with links
    var elm_vid_parent = document.getElementById("player").parentNode;
    elm_vid_parent.parentNode.replaceChild(div,elm_vid_parent);
    console.log('Finished');
})()