Android Video Layout and backbutton to activity

Question

I have an application where you can click on a button, this takes you to a new activity with four new buttons, listen, bio, ringtone, and watch. My watch button kicks off the following code:

Button cmd_watchme = (Button)this.findViewById(R.id.watch);      
    cmd_watchme.setOnClickListener(new View.OnClickListener() {
        public void onClick(View view) {

         setContentView(R.layout.tvvideo);
         VideoView video=(VideoView)findViewById(R.id.VideoView);
         MediaController mediaController = new MediaController(andy.this);
         mediaController.setAnchorView(video);
         video.setMediaController(mediaController);
         video.setVideoURI(videopath);
            video.start();
        }
    });

After the video is displayed I am trying to get the backbutton on the phone itself to take the user back to the four button selection activity, listen, bio, ringtone, and watch.

Question is, how do i do this? I was figuring if there was a way to change the ContentView after the video is displayed back to the main one for the four button page but could not figure it out. When I press the backbutton on the device, it takes me two levels up to the main selection activity not the four button activity.

I hope this was somewhat clear.

Thanks for any help.