Other very cool YouTube videos:
Middle Quick Attacks: VIDEO
How to Tip/Roll/Cut: VIDEO
Reading Hitters: VIDEO
Passing Float Serves: VIDEO
Drills to do at home: VIDEO
Basics of the 5-1 rotation THIS VIDEO.
THIS VIDEO shows the basic rules of rotation.
THIS VIDEO shows all 6 receive rotations and many common permutations
THIS VIDEO is probably the best one I've seen.
BASE Defense: VIDEO
So you want to play in college? Start HERE.