The Ken Burns effect is a type of panning and zooming effect used in video production from still imagery, popularised by American documentarian Ken Burns. We have seen this effect in web design for a while now and with this snippet, by Hugo Börjesson we see this effect created with pure CSS.
If you are having trouble with the pen, try the archived copy on GitHub
Ken Burns Pure CSS Snippet
See the Pen Ken Burns effect – pure css by Saijo George (@SaijoGeorge) on CodePen.0