By the way, the above is a Glideshow you can insert and customize on your Spark Page.
You can insert video using a link. For the one below, I recorded using QuickTime Player, shared to my YouTube account, and copy/pasted the link to this page.
Finally, you can insert Photo Grids. The pics below are examples of free teaching/learning infographic posters I make. You can grab them on my products page by clicking on the button below. No need to enter any credit card info (leave it blank).