wp_embed_excerpt_attachment

WordPress Version: 4.4

/**
 * Filters the post excerpt for the embed template.
 *
 * Shows players for video and audio attachments.
 *
 * @since 4.4.0
 *
 * @param string $content The current post excerpt.
 * @return string The modified post excerpt.
 */
function wp_embed_excerpt_attachment($content)
{
    if (is_attachment()) {
        return prepend_attachment('');
    }
    return $content;
}