$config['error']['webmhasaudio'] = _('The uploaded webm contains an audio or another type of additional stream.');
$config['error']['webmtoolong'] = _('The uploaded webm is longer than ' . $config['webm']['max_length'] . ' seconds.');
$config['error']['webmtoolong'] = _('The uploaded webm is longer than ' . $config['webm']['max_length'] . ' seconds.'); // note that this will sub the initial value from this file, not instance-config.php