Pop up screen

Hi i’m working on a flash interactive elearning application. What will be a .exe file at the end.
Basically it will funtion like powerpoint or keynotes only then in flash.
On some pages people have the possibility to view a movie. The movies need to start by pressing a more info button. Now i want to make to video’s popup in a really simple way.
How can i make this done ? So what i need to know is. How to popup a video within flash by pressing a button and then being able to close the video again and get back to the normal view.

Can someone please help me