FLVPlayback not found

Not sure what I'm doing wrong here. I wrote a bit of code to stream some video. It's just the start, but I wanted to make sure the code was correct so far so I tried to test it, but it fails. I get the error:

1172: Definition fl.video:FLVPlayback could not be found.

What am I doing wrong? Am I using the wrong player?

package 
{
import fl.video.FLVPlayback;
import flash.display.MovieClip;

/**
  * ...
  * @7111211 Chris
  */
public class MVCVideo3 extends MovieClip
{
  private var sVideoSource:String = "MapleSugarFestival.flv";
  public function MVCVideo3()
  {
   init();
  }
 
  private function init():void
  {
   var flvC:FLVPlayback = new FLVPlayback();
   flvC.source = sVideoSource;
   addChild(flvC);
   flvC.play();
  
  }
 
 
}

}