just a dev example

canClearAd.user.js

// ==UserScript==
// @name         canClearAd Element Fucker
// @namespace    myfreeer
// @version      1.3
// @description  Remove or replace some unwanted element
// @author       myfreeer, ineer
// @include      *
// @downloadURL  https://gist.github.com/myfreeer/57e9973ebe5398a246de23c152ff1d05/raw/canClearAd.user.js
// @license      MIT
// @grant        GM_getValue
// @grant        GM_setValue
// ==/UserScript==
(function() {
    'use strict';
    const webRuleUrl = 'https://ineer.github.io/canClearAd-rules/webRule.json',
        clearRuleUrl = 'https://ineer.github.io/canClearAd-rules/rules/';
    let removeRule = JSON.parse(GM_getValue('removeRule', '{"common":[]}')),
        replaceRule = JSON.parse(GM_getValue('replaceRule', '{"common":[]}')),
        lastUpdated = parseInt(GM_getValue('lastUpdated', 0)),
        errorLog = [],
        clearNum = 0,
        finish = [0, 0];
    if (Date.parse(new Date()) - lastUpdated > 1000 * 60 * 60 * 24) {
        try {
            fetch(webRuleUrl).then(res => res.json().then(json => json.urls.map(url => fetch(clearRuleUrl + url + '.json').then(res => res.json().then(json => {
                removeRule[url] = json.removeRule;
                replaceRule[url] = json.replaceRule;
                GM_setValue('removeRule', JSON.stringify(removeRule));
                GM_setValue('replaceRule', JSON.stringify(replaceRule));
                GM_setValue('lastUpdated', Date.parse(new Date()));
                finish[0] += 1;
            })))));
            fetch(clearRuleUrl + 'common.json').then(res => res.json().then(json => {
                removeRule.common = json.removeRule;
                replaceRule.common = json.replaceRule;
                GM_setValue('removeRule', JSON.stringify(removeRule));
                GM_setValue('replaceRule', JSON.stringify(replaceRule));
                GM_setValue('lastUpdated', Date.parse(new Date()));
                finish[1] += 1;
            }));
            let interval = setInterval(() => {
                if (finish[0] > 0 && finish[1] > 0) {
                    GM_setValue('removeRule', JSON.stringify(removeRule));
                    GM_setValue('replaceRule', JSON.stringify(replaceRule));
                    console.log('canClearAd rule Updated!', replaceRule, removeRule);
                    GM_setValue('lastUpdated', Date.parse(new Date()));
                    clearInterval(interval);
                }
            }, 5000);
        } catch (e) {
            errorLog.push(e);
        }
    }
    //console.log('canClearAd rule:', replaceRule, removeRule);
    for (let i in removeRule)
        if (location.href.match(i) && removeRule[i].length > 0) clearNum += removeAd(removeRule[i]);
    for (let i in replaceRule)
        if (location.href.match(i) && replaceRule[i].length > 0) clearNum += replaceAd(replaceRule[i]);
    clearNum += removeAd(removeRule.common);
    clearNum += replaceAd(replaceRule.common);
    if (window.location.href.indexOf('iqiyi') > -1) setInterval(jumpAds, 1000);
    if (errorLog.length > 0) console.warn('canClearAd error:', errorLog);
    //console.log('canClearAd cleared ads:', clearNum);
})();

/*!
 * canClearAd v0.1.0
 * Copyright 2016 Ineer
 * Licensed under MIT (https://github.com/ineer/canclearad/blob/master/LICENSE)
 */
function removeAd(rule = []) {
    let clearNum = 0;
    for (let i in rule) {
        let ad = document.querySelectorAll(rule[i][0]);
        if (ad)
            for (let j in ad) {
                ad[j] = getParent(ad[j], rule[i][1]);
                ad[j].parentNode.removeChild(ad[j]);
                clearNum++;
            }
    }
    return clearNum;
}
/*
 * replaceAd()，替换广告的函数。
 * 遇到清除广告会导致位置错乱的可以将规则移至替换广告的规则中，
 * 原理是根据广告规则匹配到相应的广告对象，并创建一个透明的的div块级标签，
 * 替换原先的广告对象。
 **/
function replaceAd(rule = []) {
    let clearNum = 0;
    for (let i in rule) {
        let ad = document.querySelectorAll(rule[i][0]);
        if (ad)
            for (let j in ad) {
                ad[j] = getParent(ad[j], rule[i][1]);
                var div = document.createElement('div');
                div.style.width = ad[j].offsetWidth + 'px';
                div.style.height = ad[j].offsetHeight + 'px';
                div.style.float = 'left';
                ad[j].parentNode.replaceChild(div, ad[j]);
                clearNum++;
            }
    }
    return clearNum;
}

function getParent(obj, num = 0) {
    if (!obj) return false;
    return num > 0 ? getParent(obj.parentNode, num - 1) : obj;
}

function jumpAds() {
    let temp_video = document.querySelectorAll('video');
    for (let i in temp_video)
        if (temp_video[i] && temp_video[i].src.match('data.video.qiyi.com/videos/other/')) temp_video[i].playbackRate = 10;
}