I made a little video the other day with instructions on how to play a musical instrument. When I played it back, the part where I instructed the students to use their left hand, looks like I am using my right hand. I had a whiteboard with words and held it up and the words were backwards. Of course, the video was all backwards because it recorded me as if I were looking into a mirror. Is there any way I can flip this whole video so that the pictures will look accurate, not like I am looking into the mirror? I have a Mac Book Pro OS X and I used I-Movie to make the video. Thanks for any help.