Youtube playlist duration

youtube-playlist-duration.js

// Just copy this into console while on a playlist page (https://www.youtube.com/playlist?list=.....)

alert(((document) => {
  let seconds = Array.from(document.querySelectorAll('.pl-video-time .timestamp span'))
  .map((span) => {
    let time = span.textContent.split(':');
    return (Number(time[0]) * 60) + Number(time[1]);
  })
  .reduce((a,b) => {
    return a + b;
  });
  let total = {
    hours: Math.floor(seconds/(3600)),
    minutes: Math.floor((seconds%3600)/60),
    seconds: (seconds%60)
  };
  return 'Playlist duration: ' + total.hours + ' hours, ' + total.minutes + ' minutes, ' + total.seconds + ' seconds';
})(document));

function main(){
 const durationContainers = Array.from(document.getElementById("items").getElementsByClassName("style-scope ytd-thumbnail-overlay-time-status-renderer"));
 var durations = durationContainers.map(__span => __span.innerText).map(duration => {
   if (duration) {
     return duration.split(":").map(duration => parseInt(duration)).reverse().reduce((acc, e, i) => {
       return acc + e * Math.pow(60, i);
     });
   }
   else {
     return 0;
   }
 });
 durations = durations.filter(element => 0 !== element);
 console.log(durations);
 const totalSeconds = durations.reduce((acc, e, _) => {
   return acc + e;
 });
 console.log(totalSeconds);
 

 const seconds = totalSeconds % 60;
 const minutes = Math.floor(totalSeconds / 60) % 60;
 const hours = Math.floor(totalSeconds / 3600);
 const totalTime = "Play Time: " + hours + ":" + minutes + ":" + seconds;

 console.log(totalTime);

 const list = document.getElementById("start-actions");
 const div = document.createElement("div");
 div.class = "style-scope style-grey-text";
 const text = document.createElement("p");
 text.innerText = totalTime;
 div.appendChild(text);
 
 list.insertBefore(div, list.childNodes[1]);
};
main();

I made an app to do that, hosted on Heroku. It can find the total length of a playlist that has up to 500 videos. If it has more than 500 videos, it shows the total length of the first 500 videos.
YouTube Playlist Length (https://ytplaylist-len.herokuapp.com/)

You should make the 'edit box' much longer and also it would be nice if it is possible to just put the full URL not just the ID.

YouTube Playlist Length (https://ytplaylist-len.herokuapp.com/)

Awesome!
Could you share app repo?

Yes, please.

You should make the 'edit box' much longer and also it would be nice if it is possible to just put the full URL not just the ID.

@H-G-Hristov
I've made the changes you suggested!

@emsi @sgadola
I've made the app repo! It's here.

@emsi @sgadola
I've made the app repo! It's here.

Awesome! You are great! I love the new way to check the playlist length either by ID or URL.
Big thanks!

Thank you.

Get YouTube playlist length visit:- YouTube playlist length