building error in my video project apk

i make video project by unity3d and an not build it the program appear this error

Error building Player because scripts had compiler errors The name 'MovieTexture' does not denote a valid type ('not found').

and this my video play code

var movTexture : MovieTexture;

function Start () { GetComponent.().material.mainTexture = movTexture; movTexture.Play(); }

the video play well but can not buld the final android file ".apk"