<video controls preload="auto" id="video1">
    <% if $VideoMP4 %><source src="id/$Video($VideoMP4.ID)" type="video/mp4"><% end_if %>
    Your browser does not support HTML5 video.
</video>

class PageVideo extends Page {

private static $has_one = array(
    'VideoMP4' => 'File',
);

function getCMSFields() {
    $fields = parent::getCMSFields();

    $fields->addFieldToTab(
        'Root.Main ',
        $uploadField = new ChunkedUploadField(
            $name = 'VideoMP4',
            $title = "VideoMP4"
        )
    );

    $uploadField->setFolderName('Uploads/videos/');
    $uploadField->setDisplayFolderName('Uploads/videos');
    $uploadField->getValidator()->allowedExtensions = array("mp4");

    $sizeMB = 500 * 1024 * 1024; // 500 MB in bytes
    $uploadField->getValidator()->setAllowedMaxFileSize($sizeMB);
    $uploadField->setConfig('maxChunkSize', .05 * 1024 * 1024 );

    return $fields;

    }

}
class PageVideo_Controller extends Page_Controller {

private static $allowed_actions = array('VideoGrab');
private static $url_handlers = array('id/$hash' => 'VideoGrab');

public function VideoGrab(SS_HTTPRequest $request) {

    $hash = $request->param('hash');

    $file = File::get()->filter('ID', $_SESSION['keyID'])->first();

    if (md5($file->Name.$_SESSION['key'])==$hash) {

        $_SESSION['key']="";
        $_SESSION['keyID']="";

        //**************** HERE IS THE CLASS *********************
        include "libraries/VideoStream.php";
        $stream = new VideoStream($file->AbsoluteURL);
        $stream->start(); exit;


        // the original php working just for some browsing and bad codes
        /*
        $ext = pathinfo($file->Filename);
        header('Cache-control: private');
        header('Content-Type: video/'.$ext['extension']);
        header('Accept-Ranges: bytes');
        header("Content-Transfer-Encoding: binary");

        return readfile($file->AbsoluteURL);  exit;
        */


    } else {
        return $this->httpError(404, "Not Found");
    }

}


public function Video($n) {

    $file = File::get()->filter('ID', $n)->First();
    $_SESSION['key']=time();
    $_SESSION['keyID']=$file->ID;

    return md5($file->Name.$_SESSION['key']);

}


}