WordPress - Hide related videos from YouTube oEmbed

function remove_related_videos($embed) {
	if (strstr($embed,'http://www.youtube.com/embed/')) {
		return str_replace('?fs=1','?fs=1&rel=0',$embed);
	} else {
		return $embed;
	}
}
add_filter('oembed_result', 'remove_related_videos', 1, true);

Hi Jason,

where exactly does this code go right in the post or page or somewhere else?

thanks,
a