I don't know.
Which version of processing do you use?

in my case the problem was that the movie-file was in the sketch folder, but it must be in the data folder (which is in the sketch folder) - that you have.

I also had problems with duplicate library.

here is your code. It worked for me with version 2.0b5

1. import processing.video.*;
2. 
   
3. Movie myMovie;
4. 
   
5. void setup() {
6.   size(200, 200);
7.   myMovie = new Movie(this, "Feedback.mov");
8.   myMovie.loop();
9. }
10. 
    
11. void draw() {
12.   tint(255, 20);
13.   image(myMovie, mouseX, mouseY);
14. } // Called every time a new frame is available to read
15. 
    
16. void movieEvent(Movie m) {
17.   m.read();
18. }

I just updated to 2.0b6. Still get the same error. 

I don't know -

did you kill the video lib from your library folder?

did you restart processing?

The constructor Movie(Movie, String) is undefined

is weird, should be at least ...(PApplet, String)....

is it really a quicktime-movie?

Thank you @PhiLho. Had my project named movie. Definitely used a bad name for some other library once before :)