First place - smartness
The classic method of creating digital signage solutions is to upload images, or videos, representing pre-made animations. However, this method is very redundant in the reality of today's technical capabilities.
The entire rendering of the slides, their animations and changes, is done on the client side (i.e., the TV on which the product is turned on, for example). In this way, the system loads only the necessary modules in the form of microcodes that run on the screen.
This not only relieves the load on the server, but also allows infinite scaling of the presented content - so it looks perfect on both small and huge resolution screens.