Develop Reference

Random video play code on homepage suddenly stopped working

I'm in charge of maintaining the website of a small foundation dedicated to video art.
On the homepage we used to have a few videos playing randomly when the user clicked on play.
But suddenly a while back it stopped working , the videos won't load on Chrome /Edge /Vivaldi while on Firefox it plays only the last video in the list ...
<div class="videosaccueil">
<section id="videos">
<video playsinline="" controls="controls" preload="none"><source type="video/mp4" src="/wp-content/uploads/2018/videos/video1.mp4"></video>
<video playsinline="" controls="controls" preload="none"><source type="video/mp4" src="/wp-content/uploads/2018/videos/video2.mp4"></video>
<video playsinline="" controls="controls" preload="none"><source type="video/mp4" src="/wp-content/uploads/2018/videos/video3.mp4"></video>
<video playsinline="" controls="controls" preload="none"><source type="video/mp4" src="/wp-content/uploads/2018/videos/video4.mp4"></video>
<video playsinline="" controls="controls" preload="none"><source type="video/mp4" src="/wp-content/uploads/2018/videos/video5.mp4"></video>
<video playsinline="" controls="controls" preload="none"><source type="video/mp4" src="/wp-content/uploads/2018/videos/video6.mp4"></video>
<video playsinline="" controls="controls" preload="none"><source type="video/mp4" src="/wp-content/uploads/2018/videos/video7.mp4"></video>
<video playsinline="" controls="controls" preload="none"><source type="video/mp4" src="/wp-content/uploads/2018/videos/video8.mp4"></video>
<video playsinline="" controls="controls" preload="none"><source type="video/mp4" src="/wp-content/uploads/2018/videos/video9.mp4"></video>
<video playsinline="" controls="controls" preload="none"><source type="video/mp4" src="/wp-content/uploads/2018/videos/video10.mp4"></video>
</section> <script><br />
(function () {<br />
"use strict";<br />
var videosSection = document.getElementById("videos");<br />
var videosSectionClone = videosSection.cloneNode();<br />
var videos = videosSection.getElementsByTagName("video");<br />
var randomVideo = videos.item(Math.floor(Math.random() * videos.length)).cloneNode(true);<br />
randomVideo.setAttribute("preload", "auto");<br />
videosSectionClone.appendChild(randomVideo);<br />
videosSection.parentNode.replaceChild(videosSectionClone, videosSection);<br />
randomVideo.play();<br />
})();<br />
</script>
</div>
I wasn't the one that made the random play code and I'm not practical enough to understand what went wrong so It would be really nice if someone can indicate to me how to fix the code if it's possible .
Thank you very much for your help .

How to get .load() working within .each() loop?

I'm modifying a bit of code I found here from this question.
I am trying to get it working now for multiple instances of a video. This is the only way I can get it working but I would like to make it work for each instance that there is a video which changes on each page this applies on.
$( function() {
const bgv = $('.bgvid');
$('source', bgv).each(function() {
const el = $(this);
el.attr('src', el.data('src'));
});
bgv[0].load();
bgv[1].load();
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<video class="bgvid" playsinline="playsinline" loop="loop" autoplay="autoplay" muted="muted" preload="none">
<source type="video/mp4" data-src="https://archive.org/download/UNIVAC-AD-2/UNIVAC2_512kb.mp4">
</video>
<video class="bgvid" playsinline="playsinline" loop="loop" autoplay="autoplay" muted="muted" preload="none">
<source type="video/mp4" data-src="https://archive.org/download/UNIVAC-AD-2/UNIVAC2_512kb.mp4">
</video>
I have tried putting it within a loop like this instead of the bgv[0].load(); but it didn't work:
$('.bgvid').each(function(){
$(this).load();
});

Just call this.load(), don't convert the DOM element into a jQuery element.
$( function() {
const bgv = $('.bgvid');
$('source', bgv).each(function() {
const el = $(this);
el.attr('src', el.data('src'));
});
bgv.each(function() {
this.load();
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<video class="bgvid" playsinline="playsinline" loop="loop" autoplay="autoplay" muted="muted" preload="none">
<source type="video/mp4" data-src="https://archive.org/download/UNIVAC-AD-2/UNIVAC2_512kb.mp4">
</video>
<video class="bgvid" playsinline="playsinline" loop="loop" autoplay="autoplay" muted="muted" preload="none">
<source type="video/mp4" data-src="https://archive.org/download/UNIVAC-AD-2/UNIVAC2_512kb.mp4">
</video>

How do i set my volume for my autoplay to be at a specific level?

In my page i have an autoplaying piece of audio, however i need to volume to be set to a specific level just incase a user has their volume up at 100%. Any idea on how to do this
HTML Code:
<audio autoplay>
<source src="Media File here">
</audio>

You can use the volume attribute:
<audio autoplay="autoplay" volume="0.5">
<source src="Media File here">
</audio>
values can be from 0.0 (silent) to 1.0 (loudest)
update
It seems like the volume attribute is not well-implemented, so here is a workaround:
audio_tags = document.getElementsByTagName('audio')
for (var i = 0; i < audio_tags.length; i++) {
audio_tags[i].addEventListener("loadstart", function() {
this.volume = this.getAttribute('volume');
}, true);
}
<audio controls="controls" volume="0.1">
<source src="https://upload.wikimedia.org/wikipedia/commons/c/c8/Example.ogg" type="audio/ogg">
Your browser does not support the audio element.
</audio>
<br /><br />
<audio controls="controls" volume="0.9">
<source src="https://upload.wikimedia.org/wikipedia/commons/c/c8/Example.ogg" type="audio/ogg">
Your browser does not support the audio element.
</audio>

HTML / JavaScript Make a video play once a condition is met

For my website, I wanted a specific video to play, once a condition is met.
e.g (If x = 1, play the video)
I have this code in the HTML file:
<div id="video">
<video width="320" height="240" autoplay,>
<source src=video_mp4 type="video/mp4">
<source src=video_ogg type="video/ogg">
Your browser does not support the video tag.
</video>
</div>
And in the JavaScript file:
document.getElementById("video").innerHTML.source.src = video_mp4;
document.getElementById("video").innerHTML.source.src = video_ogg;
But it doesn't seem to work.

You can use the following :
<video id="video1" src="vid.mp4"></video>
<script>
function playVideo(){
var video= document.getElementById("video1");
video.load();
video.play();
}
</script>

Javascript HTML5 audio - Dont play sound if already playing?

I have set up some HTML audio on my site and I have set an autoplay function after a couple of seconds, however the sound seems to be loading twice? one starts playing straight after the other although, one is a ghost and cannot see a player for it.
How could I go about telling javascript not to start playing sounds if there are already sounds playing?
<audio controls="controls" onloadeddata="var audioPlayer = this; setTimeout(function() { audioPlayer.play(); }, 2000)" }>
<source src="http://www.alanis50.com/Music/music.mp3" type="audio/mp3"/>
<source src="http://www.alanis50.com/Music/music.ogg" type="audio/ogg"/>
</audio>
The above issue has been solved however I wanted to add a flash fallback for this audio for internet explorer and so added:
<div id ="audio">
<script>var readingMusic = false; </script>
<audio controls="controls" loop="loop" onloadeddata="var audioPlayer = this; if (!readingMusic){readingMusic = true;setTimeout(function() { audioPlayer.play(); }, 2000)}" }>
<source src="http://www.alanis50.com/Music/music.mp3" type="audio/mp3"/>
<source src="http://www.alanis50.com/Music/music.ogg" type="audio/ogg"/>
<embed type="application/x-shockwave-flash" flashvars="audioUrl=http://www.alanis50.com/Music/music.mp3&autoPlay=true" src="http://www.google.com/reader/ui/3523697345-audio-player.swf" width="400" height="27" quality="best" wmode="transparent"></embed>
</audio>
</div>
<div id="audiohide">
<audio controls="controls" loop="loop" onloadeddata="var audioPlayer = this; if (!readingMusic){readingMusic = true;setTimeout(function() { audioPlayer.play(); }, 2000)}" }>
<source src="http://www.alanis50.com/Music/music.mp3" type="audio/mp3"/>
<source src="http://www.alanis50.com/Music/music.ogg" type="audio/ogg"/>
<embed type="application/x-shockwave-flash" flashvars="audioUrl=http://www.alanis50.com/Music/music.mp3&autoPlay=true" src="http://www.google.com/reader/ui/3523697345-audio-player.swf" width="400" height="27" quality="best" wmode="transparent"></embed>
</audio>
</div>
But now the flash audio is behaving how the previous audio did obviously the javascript is not affecting the flash embed?

Can't you have a boolean telling the browser if there is already some music playing ?
Example with 2 tags:
<script>var readingMusic = false; </script>
<audio controls="controls" onloadeddata="var audioPlayer = this; if (!readingMusic){readingMusic = true;setTimeout(function() { audioPlayer.play(); }, 2000)}" }>
<source src="http://www.alanis50.com/Music/music.mp3" type="audio/mp3"/>
<source src="http://www.alanis50.com/Music/music.ogg" type="audio/ogg"/>
</audio>
<audio controls="controls" onloadeddata="var audioPlayer = this; if (!readingMusic){readingMusic = true;setTimeout(function() { audioPlayer.play(); }, 2000)}" }>
<source src="http://www.alanis50.com/Music/music.mp3" type="audio/mp3"/>
<source src="http://www.alanis50.com/Music/music.ogg" type="audio/ogg"/>
</audio>

Well, that's a part of your jScript.js.
It seems that problem is in this line:
location = base + "/#" + current.replace(base, "");
You navigating to the new url without leaving current page(if origins are the same and the only difference is in hashes). I recommend you to start playing audio after changing location origin.
So you might place your autoplay logick right after this location changes.