This is not made for the purpose, it's made for quadrocopter and than just customized with booms and clamps for handheld use. Im am long time cinestar user...
All controlers for stabilisation have Mems Accelerometer, Mems Gyros,Magnetometer..etc (zenmuse, picloc, tarot,skyline, radian and you can look into new one cheapest, made just for brushless - alexmos)
MoVI do pans and tilt the same way as any other stabilized gimbal on the market that use 3 brushlees motors (roll, tilt and pan) and zenmuse does excatly the same thing... You can see on the clip that they are using rc station, they have not even made yet dedicated pan/tilt + speed potentiometer joystick and tht's easy thing to do, expecialy if you plan to charge it 15K...