The most popular image formats are supported. Please note that if you're using animated GIFs, they need to be embedded in a web-page.
When you prepare images make, sure they are as close as possible to 1920x1080px.
The full list of support images file extensions are:
Screenly Pro supports all major video formats and automatically encodes them for the best possible playback fidelity on your screen.
The full list of supported file extensions are:
When you want a URL to refresh each time it displays, you can make that happen by adding the URL asset two times and adding an image asset, (say a black or white screen or any other image asset), in between the URLs.