Thiago,
Your link didn't work for some reason, "404 PAGE NOT FOUND". The following link seems to connect:
http://www.wildkingdom.com/nextwildguide
There is a control bar beneath the video, slide it over until you see Thiago with a sand back drop (see below) with the caption "Your next Wild Guide - Thiago" Click on it and the vote button will appear on the lower left of the screen.
Good luck in the contest!
.