Use a waterproof case, or waterproof video recording device. Attach the suction cups to glass/smooth tiles in the pool, or use the open hooking end with a rope or string. Get creative and you can get any amazing shot you can dream up.
The northern part which is from Cabinda to Ambriz, has a damp, tropical climate. The zone begins a little to the north of Luanda (Angola's capital) and extends to Namibe, the Malanje region. The eastern strip has a moderate tropical climate too.