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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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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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