function wpc_video_field( $form_fields, $post ) {
    $form_fields['wpc-video-url'] = array(
        'label' => 'Video URL',
        'input' => 'text',
        'value' => get_post_meta( $post->ID, 'wpc_video_url', true ),
        'helps' => 'If provided, video will be loaded',
    );

    return $form_fields;
}

add_filter( 'attachment_fields_to_edit', 'wpc_video_field', 10, 2 );

/**
 * Save values of Photographer Name and URL in media uploader
 *
 * @param $post array, the post data for database
 * @param $attachment array, attachment fields from $_POST form
 * @return $post array, modified post data
 */

function wpc_video_field_save( $post, $attachment ) {
    if( isset( $attachment['wpc-video-url'] ) )
        update_post_meta( $post['ID'], 'wpc_video_url', $attachment['wpc-video-url'] );

    return $post;
}

add_filter( 'attachment_fields_to_save', 'wpc_video_field_save', 10, 2 );

function getVimeoVideoIdFromUrl($url = '') {

        $regs = array();

        $id = '';

        if (preg_match('%^https?:\/\/(?:www\.|player\.)?vimeo.com\/(?:channels\/(?:\w+\/)?|groups\/([^\/]*)\/videos\/|album\/(\d+)\/video\/|video\/|)(\d+)(?:$|\/|\?)(?:[?]?.*)$%im', $url, $regs)) {
            $id = $regs[3];
        }

        return $id;

    }

function getYoutubeVideoIdFromUrl($url = '') {

        $match = array();

        $id = '';

        if (preg_match('%(?:youtube(?:-nocookie)?\.com/(?:[^/]+/.+/|(?:v|e(?:mbed)?)/|.*[?&]v=)|youtu\.be/)([^"&?/ ]{11})%i', $url, $match)) {
            $id = $match[1];
        }

        return $id;

    }