That video demonstrates why it is silly to try for higher waves in the present architecture. The behavior of ships is unrealistic, and the waves under Red Eagle are cartoons of real waves.
Here is one of the more recent rounds of silliness:
http://www.shipsim.com/ShipSimForum/index.php/topic,14250.msg176074.html#msg176074 (http://www.shipsim.com/ShipSimForum/index.php/topic,14250.msg176074.html#msg176074)