You can easily add interest to an motion piece by adding some animated texture to it. There are a few ways this can be done. Using a dedicated plugin or stock footage are two popular methods. You can also do it on your own and make a custom animated texture pretty easily.
Showing use 3 different ways, is The Drawing Room’s Nol Honig who shares some of his favorite tips along the way.
Nol shows how you can use a scanned image and some manually create hold keyframes to create an interesting animated texture aesthetic. There is also a technique that makes use of the After Effects native fractal noise effect, using a simple expression to control the animation and interval.
The last method involves using a few photoshop images that can be controlled using a similar expression from the last tip. How useful is posterizeTime in Ae? Very.