Use the YouTube upload button in the interface to put the movie on YouTube. Needless to say, you need to have a Coogle account and an Internet connection for this feature to work. Select the 'Movie' button in the bottom bar of Picasa. The first slide will be a text slide to introduce the slideshow. Rearrange the photos, add captions. select a music, select the transitions. and preview the slideshow a few times. Once you are done, click on save movie, and then use the YouTube upload button in the interface to put the movie on YouTube. Needless to say, you need to have a Coogle account and an Internet connection for this feature to work.