So you would like to give your robot a rotating camera? The UCTRONICS 2DOF Rotary Base can help. It has a fully metal bracket for robotic arms and Raspberry Pi camera. It comes with 2 x DS-3115MG digital servos and can rotate 18-degrees horizontally and vertically.
This 2DOF rotary base kit has a speed of 15sec/60° and stall torque of 15kg/cm.