First time that I see that video... and yes, it's the same guy that designed the RS:X 
Tiesda You, the Starboard shaper built a trimaran so he could compete with the heavier guys on speed but it was just an experiment.
Only reference I can find to it is here:-
translate.google.co.uk/translate?hl=en&sl=fr&u=http://www.directwind.com/forum/forum-t7423-m94387.html&prev=/search%3Fq%3Dtrimaran%2Btiesda%2Byou%2Bkevin%2Bpritchard%26hl%3Den%26biw%3D1269%26bih%3D696
