What type of yacht is it? Brand and type?

Producer on the commentary track says name of the boat was called the Fourplay (sp?) They covered that name up you can see the black rubber piece above the word Durban at the ship's stern.
Durban based boat perhaps, though the port scenes were shot in Cape Town, South Africa.

Its a Ferretti 720.

http://www.ferretti-yachts.com/_vti_g2_miss_aspx_idM_3635-rpstry_20_-- luxury-yacht-italian-boat-builder-motoryacht-sales.sphtml