How to create/popup a model dialog window over the vedio

There are button, picture box, text, link etc. in the dialog.

If I put everything in another layer with new movieClip, it seems I have to change all the x and y for each control in the movieClip when the dialog is popup. e.g.

import fl.video.*;

videoPlayer.autoRewind = false;

videoPlayer.addEventListener(fl.video.VideoEvent.PAUSED_STATE_ENTERED,showText);

videoPlayer.addEventListener(fl.video.VideoEvent.STOPPED_STATE_ENTERED,showText);

function showText(event:fl.video.VideoEvent):void {

     //move each control

    textWindow.x = 275;

    textWindow.y = 200;

    btn_1.x = 255;

    btn_1.y = 200;

    btn_2.x = 235;

    btn_2.y = 200;

     ................................

}

textWindow.resumeButton.addEventListener(MouseEvent.MOUSE_UP,playVideo);

function playVideo(event:MouseEvent):void {

    textWindow.y = -500;

    videoPlayer.play();

}