Jetpack embed not work with Custom fields

Hi, I use custom fields to add a youtube videos with this code in my template:

function video($post_id){
	$video_embed =	get_post_meta($post_id, 'url_video', true);
	$video_insertar = wp_oembed_get( $video_embed	 ); // WP estandard
	return '<div class="video-container"><p>'. $video_insertar.'</p></div>';

My problem is that I can't use this method for the jetpack embeds (facebook, twitter, etc.) because not show anything.

My test page:

Best regards,