Silhouette Animation
Anime
Silhouette animation is created by backlit shadow puppets. Shadow plays have existed for centuries, but on film it is a form of stop-motion. The effect is usually created with paper cutouts, which is why it is often considered a subgenre of cutout animation.
Cutout animation stacks:
https://myanimelist.net/stacks/46772
Cutout animation stacks:
https://myanimelist.net/stacks/46772