youtube_formatter.module

<?php
/**
 * @file
 * Defines simple YouTube formatter for the link field.
 */

/**
 * Implements hook_theme().
 */
function youtube_formatter_theme()
{
    return array(
        'youtube_link_formatter' => array(
            'variables' => array(
                'video_id' => NULL,
                'height' => NULL,
                'width' => NULL
            ),
        ),
    );
}