cyclegadget:
The motor shown in the video is a "universal motor". That type of motor has brushes and are normally used in hand drills and vacuum cleaners. They operate in a similar manner to DC motors. They produce good torque and work well with adjustable voltage controls such as found in a hand drill with variable speed.
I'm going to counter-guess with a permanent magnet DC motor. PM motors tend to be lower RPM than universal and more appropriate in a gear-reduction situation. If it were a universal motor it would also be much louder.
To Chems, you should calculate how much torque your motor will need by pushing (or pulling) a board through using a weigh scale.