PHP served video display on Apple products - php

Question

I'm trying to show a video on my Mac and I phone but I can't get it to work. My videos are served by php, I've been reading it has to do with range headers not being sent but I can't figure out how to do it correctly.
Heres what I have so far:
HTML:
<video controls="true" autoplay muted loop>
<source src="http://my_site.com/video/394934" type="video/mp4">
</video>
PHP:
// Get file GUID
$file_guid = (int) get_input('file_guid', 0);
// Get file thumbnail size
$size = get_input('size', 'small');
$file = get_entity($file_guid);
if (!elgg_instanceof($file, 'object', 'file')) {
exit;
}
$simpletype = $file->simpletype;
if ($simpletype == "image") {
// Get file thumbnail
switch ($size) {
case "small":
$thumbfile = $file->thumbnail;
break;
case "medium":
$thumbfile = $file->smallthumb;
break;
case "large":
default:
$thumbfile = $file->largethumb;
break;
}
// Grab the file
if ($thumbfile && !empty($thumbfile)) {
$readfile = new ElggFile();
$readfile->owner_guid = $file->owner_guid;
$readfile->setFilename($thumbfile);
$mime = $file->getMimeType();
$contents = $readfile->grabFile();
// caching images for 10 days
header("Content-type: $mime");
header('Expires: ' . gmdate('D, d M Y H:i:s \G\M\T', strtotime("+10 days")), true);
header("Pragma: public", true);
header("Cache-Control: public", true);
header("Content-Length: " . strlen($contents));
echo $contents;
exit;
}
}

Answer 1

if it is in fact a range headers issue, there's a github project with a code example tackling this issue for Safari/Mac:
https://gist.github.com/codler/3906826