I use FlexClip to showcase my own photo stills in a fun way with sound and cute animations. You can get up and running quickly using the templates, it's so easy to customise, import your images and the rendering is quick too (just confirming that my clips are short, less than 3 mins). Using the timeline editor, I can rearrange when the text comes in for my headings and captions, and it lets you see all the layers and their end points which you can drag to adjust. The stock media are handy, for instance, if you have a theme for school, you can find a stock photo of crayons and something nice to use in the background while your actual photos overlay at the top. The sound library is also good to find a suitable sound track and not worry about accreditation. All in all, I love this product. It's quick and easy to use.