This was a school project and the egg hatched while the camera was rolling!
This particular bird is still happily pecking away at one of the school kids' houses, along with a number of other class project chickens. Apparently, there are lots of people who don't want to see them go from classroom pet to dinner table. :-)
The incubator is a McMurray 2TX6:
For those viewers rearing chicks of their own - here is a link to some good info on the web:
There is far more info online - just Google for "chicken egg hatching" to find tons, and good luck! =)