He is a narcissistic computer who interrupts the Globe at the start of the video to show the puppets his digital world, and explains what activities the puppets can do within the digital world, trapping the puppets inside with no clear way out. 
Haphephobia
When angered, his hands become wires, he gets turquoise pupils with red veins on his eyes and a "DON'T TOUCH!" on his now green screen.
Colin The Computer has two hands, one a pointer, one a hand with the index finger pointing up.