The footage includes:
A Henry Cavill¬†Clark Kent scene in Smallville when Ma Kent pulls up in the truck: Clark is shown smiling.
A Parademon scene.
The Iris West deleted scene¬†with Ezra Miller and Kiersey Clemons.
Ray Fisher Cyborg scene.
Another Ray Fisher scene as Victor Stone.
Cyborg flying scene.
A Cyborg computational scene of some sort.
Justice League Mother box scene.