It’s an art movement. It’s art from any medium that contains movement perceivable by the viewer.
Kinetic art is art from any medium that contains movement perceivable by the viewer or depends on motion for its effect. Canvas paintings that extend the viewer’s perspective of the artwork and incorporate multidimensional movement are the earliest examples of kinetic art. Wikipedia.
Here is an undulating kinetic artwork by Scale Collective.
It blends organic movement and architectural forms in an amazing installation. Created for the Constellations Festival in Metz, France, “Flux”.
In this video, Anthony Howe discusses creating the cauldron for the 2016 Rio Olympics. Howe is a kinetic wind sculptor from Orcas Island, Washington.
These optical illusions force the viewer to engage with the artwork in a different way and see various perspectives.