Youtube embed shortcode [youtube video=" "] < self closing shortcode

_youtube-embed-url.php

<?php 
function getYoutubeEmbedUrl($url) {
	$shortUrlRegex = '/youtu.be\/([a-zA-Z0-9_]+)\??/i';
	$longUrlRegex = '/youtube.com\/((?:embed)|(?:watch))((?:\?v\=)|(?:\/))(\w+)/i';

	if (preg_match($longUrlRegex, $url, $matches)) {
		$id = $matches[count($matches) - 1];
	}
	if (preg_match($shortUrlRegex, $url, $matches)) {
		$id = $matches[count($matches) - 1];
	}

	return isset($id) ? $id : 'error';
}

// Add Shortcode
function youtube_shortcode( $atts ) {

	// Attributes
	$atts = shortcode_atts(
		array(
			'video' => '',
		),
		$atts
	);

	return '<div class="video-wrapper"><iframe src="https://www.youtube.com/embed/' . getYoutubeEmbedUrl($atts['video']) . '" frameborder="0" allowfullscreen=""></iframe></div>';

}
add_shortcode( 'youtube', 'youtube_shortcode' );

youtube-embed.scss

.video-wrapper {
	iframe {
		position: absolute;
		top: 0;
		left: 0;
		width: 100%;
		height: 100%;
	}
	height: 0;
	padding-bottom: 56.3%;
	position: relative;
}