Today, I found http://www.greenlayers.com/ - an ecommerce site for stock alpha videos. They provide some free samples, and I decided to see how well one works with Kdenlive 0.7.4.
This tutorial will show you how to overlay several images over a video and animate them
This tutorial will show you how to create a scrolling panorama from a picture file. Requires Kdenlive >= 0.7.3