You could use something like dynamic materials on HUD widgets to have an animated HUD.
A link to help start the research. I haven’t done extensive work with the new HUD widget system, but my understanding is that it’s fairly powerful and open.
I would also suggest looking at the Stylized Rendering Showcase:
https://docs.unrealengine.com/latest/INT/Resources/Showcases/Stylized/index.html
They have a material on the trees that creates a wavy effect, to help demonstrate another method of having dynamically updating materials that “move”.