javascript - Autoplay Youtube Video When Scrolled to

Is there any way to autoplay a youtube video when you scroll to it on the page? I've tried to google this and it looks like theres some methods for the old youtube embed code. I'm looking for an updated version of this - does anyone know how to automatically play youtube videos when you scroll down a certain amount of pixels on a page?

Thanks for your help

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4 Answers 4

Sorted by: Reset to default 4

<iframe id="ytplayer" type="text/html" width="640" height="390"
  src="http://www.youtube.com/embed/M7lc1UVf-VE?autoplay=1&origin=http://example.com"
  frameborder="0"/>

Use the above to play the video automatically. per your question to play it only when scrolled down, check this thread.

Triggering a video autoplay based on scroll position

Here is the complete code. have tested this on firefox and chrome. You can check the sample working here.

http://www.foftv.com/samplejs/vidscroll2.html

<html><head>
    <style>
    #e1, #e2, #e3, #e4, #e5, #  ytplayer{ 
        height:390px; width:640px; display: block;
        opacity: 0;
    }
    </style>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
    <script>
      // Load the IFrame Player API code asynchronously.
      var tag = document.createElement('script');
      tag.src = "https://www.youtube.com/player_api";
      var firstScriptTag = document.getElementsByTagName('script')[0];
      firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);

      // Replace the 'ytplayer' element with an <iframe> and
      // YouTube player after the API code downloads.
      var player;
      function onYouTubePlayerAPIReady() {
        player = new YT.Player('ytplayer', {
          height: '390',
          width: '640',
          playerVars : {
                autoplay : 0
            },
          videoId: 'M7lc1UVf-VE'
        });
      }

      $(window).scroll(function() {
        $("iframe").each( function() {
            if( $(window).scrollTop() > $(this).offset().top - 200 ) {
                $(this).css('opacity',1);
                player.playVideo();
            } else {
                $(this).css('opacity',0);
                player.stopVideo();
            }
        }); 
    });

    </script>
    </head>
    <body>



    <div id="e1">Some element 1</div>
    <div id="e2">Some element 2</div>
    <div id="e3">Some element 3</div>
    <div id="ytplayer">Youtube player here</div>
    <div id="e4">Some element 4</div>
    <div id="e5">Some element 5</div>
    </body>
    </html>

I'm aware this is an old question but I found a solution that fits my need perfectly so I thought I would share it. I found out you can actually append &autoplay=1 to the iframe src, it automatically plays the video.

$(window).scroll(function() {
 
//will trigger when your element comes into viewport
    var hT = $('#YourElement').offset().top,
    hH = $('#YourElement').outerHeight(),
    wH = $(window).height(),
    wS = $(this).scrollTop();



if (wS > (hT+hH-wH)){
    //appends &autoplay=1 to iFrame src, making it autoplay
    var videoUrl = $('#YourIFrame').attr('src');
    $('#YourIFrame').attr('src', videoUrl + "&autoplay=1");
}

I know it's a very old question, but I've been googling it and none of the answers worked for me, so this is the solution I ended up implementing:

<div id="video-box">
    <iframe id="i_video" src="" frameborder="0" allowfullscreen></iframe>
</div>
<script>
    window.onscroll = function() {
        var dv = document.getElementById('video-box');
        var v = document.getElementById('i_video');
        if ((window.scrollY < (dv.offsetTop + dv.offsetHeight)) && ((window.scrollY + window.outerHeight) > dv.offsetTop)) {
            if (v.src=='' || v.src==location.href) {
                v.src='VIDEO_URL';
            }
        } else {
            v.src='';
        }
    }
</script>

An alternate method below checks when the div containing the video is in view, and then adds the autoplay code to the end of the src link, removing it when out of view. This causes the video to restart from the beginning every time it scrolls into view again.

JAVASCRIPT (Also requires Jquery)

$(document).ready(function() {
    var inner = $(".video-container");
    var elementPosTop = inner.position().top;
    var viewportHeight = $(window).height();
    $(window).on('scroll', function() {
        var scrollPos = $(window).scrollTop();
        var elementFromTop = elementPosTop - scrollPos;
        if (elementFromTop > 0 && elementFromTop < elementPosTop + viewportHeight) {
    $("#video")[0].src += "&autoplay=1";} else {}
    });
})

HTML (Replace YOURVIDEOID with the ID of the YouTube video you want to show):

 <div class="video-container">
        <iframe width="560" height="315" src="https://www.youtube.com/embed/YOURVIDEOID?&mute=1" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen id="video"></iframe>
    </div>

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javascript - Autoplay Youtube Video When Scrolled to - Stack Overflow

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