funkyguy4000:
What kind would I need? Digital or analog?Also, will cheap $10 be able to work like those in the video?
I would be willing to go up to $14 dollars each.
All radio control servos are 'digital' in that they are controlled by sending them a PWM (PPM really) pulse to command them to a specific position and stop. So called Digital servos are just more advanced (and expensive) servos that with special interfacing hardware and PC software can be 'tuned' and set-up for specific responses. You only need the the standard cheap 'analog' servos to get started learning how to use and control them with your arduino. Later once you have more experience with using servos you may possibly pick a project that needs a more specific servo feature like more torque, larger travel, etc. And yes stay away from so called modified 'continuous' travel servos, you will not be getting what you think you will be getting.
Lefty