Casting of the kids...

These are more featurettes - but there is singing:
Casting:


Casting Kurt:


Casting Artie:


Casting Mercedes:


Casting Tina:


Casting Will Schuester:


Casting Rachel:


Casting Finn:


Casting Quinn:


I wish there were more casting videos for at least Sue, Puck, Terri, Emma and Brittany.