MorganS:
No, gears are more difficult. The spacing between the axles must be exact. A toothed belt gives some more flexibility. Look,at how most 3D printers are built, although they must have linear motion, which is even more convenient for belt drive.Two motors is really not going to be easier than one. Double the gears, double the mounting hassles, extra overall width, extra power consumption. I would go with direct-drive and one motor before considering two. Have you done your torque calculation yet?
Have to agree with this, though I even already found some cheap gears for this 
Even I agree I might try gears first because of same reason I will put 2 motors - it will be more stable and sturdy - I can't show now why I need 2 motors and potencially gears instead of belt, but it will be many adjustable parts, this and heavy camera will not be very durable and weight of this device is not an issue, potentially flimsy head - is.
And no, I didn't do calculations because I don't know how, i just go with brute force and hope for the best 
And this is another reason for 2 motors instead of 1, with 4:1 gears/belt two motors will provide plenty of torque.
MorganS:
Also, while it is possible to put two motors in series or parallel from one controller, it is better to have two controllers paralleled on the Arduino side. The modern controllers in the A4988 and DRV8825 are really smart and they do a lot of clever stuff to the motor. Look at the options available here: Pololu - Stepper Motor Drivers
Again, I am noob at this, but as I understand If I connect right pairs of wires of each motor to 1 controller it will work fine, only output power will be doubling. I need both motor to rotate exactly the same step amount, just one of them have to rotate oposite direction compared to other one, and this will be achieved by mixing right pairs. Or I am missing something? Only 1 controler will save some money and Arduino pins aswell.
Also, to get sound output from one pin I will need active buzzer right These ones will be good?
P.S. I am from Europe, so best way for me to purchase parts is via Ebay
And thank You for keep helping me, I really appreciate it.