Soooo .... from the comments and posts I could read, I have to install a 3rd party software in order to do that!  Could someone recommend a free and easy one?  It was my first try with Movie Maker, I had fun doing a souvenir movie of our family vacation that I wanted to share with the grand-parents (instead of sending a bunch of pictures).  The video is only 822 MB

Thank you in advance!