Embeded Video on a PHP included page not showing - php

Question

The content of my site is loaded through a PHP include, based of off the options a user selects from the menu at the top of the page-- the menu option reloads the index.php page and points it to the content to include.
This works fine for just about anything, except on pages that have embedded video via the HTML <video> tag. On those pages, the embedded video still appears to be clickable (i.e., clicking on parts of it will take me to the YouTube page hosting the video) but I can't actually see the video or video player.
Is this something to do with using a PHP include, or is there something else I'm missing? I'd been previously using iframes for my site content, but wanted to get away from that as much as possible.
EDIT: To clarify, this is the behavior I'm seeing when I load the page:
The video is definitely there; I can save it, and if I right click on it, I get the context menu for the video player. I just can't actually see the video. This is the block on the index.php file that actually loads the page content:
<div id="frame">
<?php
$url = '';
if (!empty($_GET['menu'])) {
$url .= $_GET['menu'] . '/';
}
if (!empty($_GET['customer'])) {
$url .= $_GET['customer'] . '/';
}
if (!empty($_GET['product'])) {
$url .= $_GET['product'] . '/index.';
}
if (!empty($_GET['pagetype'])) {
$url .= $_GET['pagetype'];
}
if (empty($url)) {
$url = 'intro.html';
}
include $url;
?>
</div>
All of the $GET values are supplied by the link the user selects from the main menu, like so:
<li><a class="mainMenuLink" href="index.php?menu=products&customer=customer2&product=product5&pagetype=html">Example</a></li>
EDIT 2: Here's the HTML markup generated by the page for the section surrounding the videos:
<div id="tabs-5"><!-- start tab 5-->
<p>Access videos detailing operations and maintenance.</p>
<div class="accordion">
<h3>Video 1</h3>
<div>
<video src="./products/coffee/sinf/video/video1.mp4" controls></video>
</div>
<h3>Video 2</h3>
<div>
<video src="./products/coffee/sinf/video/video2.mp4" controls></video>
</div>
</div>
</div><!-- end tab 5-->

Answer 1

If you check your console log, and don't see an error for a 404 Not Found, then you are likely not doing anything wrong on the PHP end.
It looks like you are using Chrome, so Inspect Element should let you know if there is any issue loading your include and it not calling the right file path to your video or something.
This could be browser dependent, and it is also recommended (the last I checked) to include multiple file types for HTML5 videos to be cross browser compatible.
This has almost always worked for me -
<video preload="auto" autoplay="" controls>
<source src="video.mp4" type="video/mp4">
<source src="video.webm" type="video/webm">
<source src="video.ogv" type="video/ogv">
</video>
Adding these lines to your .htaccess file will help, too -
AddType video/mp4 .mp4 .m4v
AddType video/webm .webm
AddType video/ogv .ogv
VLC has a great open-source player that can convert to the additional file types - http://www.videolan.org/vlc/index.html