use Selective\VideoType\VideoTypeDetector;
use Selective\VideoType\Provider\DefaultVideoProvider;
use SplFileObject;

$file = new SplFileObject('example.mp4');

$detector = new VideoTypeDetector();

// Add video detectors
$detector->addProvider(new DefaultVideoProvider());
$videoType = $detector->getVideoTypeFromFile($file);

// Get the video format
echo $videoType->getFormat(); // mp4

// Get the mime type
echo $videoType->getMimeType(); // video/mp4

$video = new SplTempFileObject();

$video->fwrite('my file content');

$detector = new VideoTypeDetector();

// Add video detectors
$detector->addProvider(new DefaultVideoProvider());

echo $detector->getVideoTypeFromFile($file)->getFormat();