In this ScreenFlow tutorial, you will collect many pictures by going onto the Internet and using Skitch. In some cases, you will simply right click on the pictures on this page. Then you will “Save as” to your hard drive.
To animate these photos in ScreenFlow, you will first animate them in Keynote. If you keep reading the Keynote section, it will tell how to collect the photos and then how to get the Keynote photo movement to be duplicated in ScreenFlow.
Below is a YouTube video giving some examples of how Keynote can animate images. The Keynote slide was captured, edited and uploaded to YouTube with ScreenFlow.