NOOB HERE - inserting video

OK I’M A DEFINITE NOOB! I am doing a simple video and I wanted to add this video http://www.istockphoto.com/file_closeup/object/3863966_money_falling_from_the_sky.php?id=3863966 to the background of one of the tweens I have. I’ve tried inserting it onto a layer and importing it and I still get an error message and it doesn’t play right “WARNING: Actions on button or MovieClip instances are not supported in ActionScript 3.0.” And then something about objects going to be ignored.

My question is HOW do I put this into my video? Do I put it in a different scene? Is there some script writing (i guess that’s what it’s called) I have to do?? Cause I’ve never done that!