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Very simple method to add custom poster frame to youtube video without using youtube API. This code is also valid in browsers not supporting window.postMessage (API uses postMessage). The trick is adding the iframe in a comment. Javascript reads comment contents and saves iframe definition to a var. When JQuery (for the sake of brevity, not real…
.video { position: relative; padding-bottom: 56.25%; /* 16:9 */ height: 0; }
.video img { position: absolute; display: block; top: 0; left: 0; width: 100%; height: 100%; z-index: 20; cursor: pointer; }
.video:after { content: ""; position: absolute; display: block;
background: url(play-button.png) no-repeat 0 0;
top: 45%; left: 45%; width: 46px; height: 36px; z-index: 30; cursor: pointer; }
.video iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
/* image poster clicked, player class added using js */
.video.player img { display: none; }
.video.player:after { display: none; }
<div class="video">
<img src="poster.jpg">
<!-- <iframe width="940" height="529" src="" frameborder="0" allowfullscreen></iframe>-->
$(function() {
var videos = $(".video");
videos.on("click", function(){
var elm = $(this),
conts = elm.contents(),
le = conts.length,
ifr = null;
for(var i = 0; i<le; i++){
if(conts[i].nodeType == 8) ifr = conts[i].textContent;
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solepixel commented Oct 10, 2014

The problem I had in IE8 was conts[i].textContent returned as undefined. There were a couple of alternatives in IE8, but I went with conts[i].nodeValue. This may help someone else dealing with the same issue.

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thinsoldier commented Oct 21, 2014

Instead of an html comment you can put the details of the iframe into a data attribute. You'd have to change the JS but it would be simpler,m more reliable jquery instead of counting nodes and inspecting nodeTypes

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seriema commented Nov 4, 2014

Is this working for you guys? The youtube-poster-frame.css seems to make things worse. Most swipes result in the video starting as well. Here's my jsFiddle demonstrating this. Any help would be appreciated!

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aiphee commented May 12, 2015

I have made some adjustments to it. I want video to be image again when i change slide. Also, giving data atribute instead of comment seems much better to me.

$(function () {
        var videos = $(".YTvideo");

        $('#YTslider').on('afterChange', function () {

        videos.on("click", function () {
            var that = $(this);

            setTimeout(function () {
                var YTid ='yt_id');
                that.addClass("player").append('<iframe width="940" height="529" src="' + YTid + '?autoplay=1" frameborder="0" allowfullscreen></iframe>');
            }, 400);


PS: you can get jpg from youtube video from this url:

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anditra commented Jul 2, 2015

hi there I'm new and this would help me a lot with my current project! can you please post the html too?
Because I don't know how to get the YTid and where do you use the #YTslider.

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esedeerre commented Jul 7, 2015

I´ve not tested it, but i think that ?autoplay=1 won´t work on IOS & Android, so users will have to make a second click... Any solution to this?

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anditra commented Jul 15, 2015

I've tried it, but the only thing that works is setting the iframe, but without the id, so it doesn't work. And it woun't remove the iframe with a second click, it just sets another iframe..

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binmatai commented Nov 19, 2015

Really good job on the site, Keep up the good work!
Baa baa Black Sheep

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thecopelandcollective commented Apr 7, 2016

can you explain what this for statement does?

for (var i = 0; i < length; i++) { if (conts[i].nodeType == 8) ifr = conts[i].textContent; }

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Jakobud commented Apr 25, 2016


That code is iterating through the contents of the element, and if it's an HTML comment ( .... see constant value of 8) then essentially uncomment it, which in turn loads the iframe.

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srinukatari commented May 24, 2016

its not working the iframe not loads

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boistordu commented Mar 28, 2017

hi sorry to disturb you guys, but where do I put the script? just before the div from the video ?

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nikisebi commented Mar 16, 2021

Works perfectly, and makes pages with a bunch of videos load fast. Thanks!

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