youtube mini ad block (When you don't want to use ad block, but still don't want to manually click the close button for the ad)

block.js

// ==UserScript==
// @name youtube mini ad block
// @namespace Violentmonkey Scripts
// @grant none
// @include     https://www.youtube.com/*
// ==/UserScript==

var started = false;
var adWholeTime = 0;

function timeStringToSeconds(time) {
  var t = time.split(":");
  var wholeSeconds = t[0] * 60 + t[1] * 1;  
  return wholeSeconds;
}


try {
  var style = document.createElement("style");

  // WebKit hack :(
  style.appendChild(document.createTextNode(""));

  // Add the <style> element to the page
  document.head.appendChild(style);

  var sheet = style.sheet;
  sheet.insertRule(".video-ads {  visibility: hidden; }", 0);
  sheet.insertRule(".ad-div {  visibility: hidden;  position:absolute; }", 0);
}
catch(e) {
  console.error(e);
}

window.setInterval(function() {
  if(!started) {
    console.log("yt mini ad block");
    started = true;
  }
    
  try {
    var buttons = document.getElementsByClassName("videoAdUiSkipButton");
    if(buttons.length > 0) {
      var adRemainingTimeString = document.getElementsByClassName("videoAdUiAttribution")[0].innerText
      var adRemainingTime = timeStringToSeconds(adRemainingTimeString.match(/\d.*/g)[0]);
      var wholeSeconds = timeStringToSeconds(document.getElementsByClassName("ytp-time-current")[0].innerText);
      
      if(!adWholeTime) {
        adWholeTime = adRemainingTime;
      }
      
      console.log(wholeSeconds, adWholeTime, adRemainingTime);
      
      if(wholeSeconds > 30 || adWholeTime - adRemainingTime > 30) {
        console.log("skiped. " + wholeSeconds)
        document.getElementsByClassName("videoAdUiSkipButton")[0].click();
      }
	}
  	else {
      adWholeTime = 0;
    }
  }
  catch(e) {
    console.error("yt mini ad block", e)
  }
}, 16);

window.setInterval(function() {
  //autoclick show more
  //
  if(document.getElementsByClassName("yt-uix-expander yt-uix-expander-collapsed").length == 2) {
    document.getElementsByClassName("multirow-shelf-expander")[0].click();
    //clicked = true;
  }
}, 200);