Meta’s Animated Drawing (https://sketch.metademolab.com/) animates drawings. Editable masking with pencil and eraser, placement of morphological markers. 32 animation templates offered. Mp4 export.
Requires a frontal character with arms and legs detached from the body.
No accounts and unlimited.

Testing since:
– https://www.pexels.com/fr-fr/photo/nourriture-aliments-art-fruits-6546178/
– https://www.pexels.com/fr-fr/photo/creativite-imagination-enfant-enfance-8501627/
– https://commons.wikimedia.org/wiki/File:Clove_interview_dress.jpg?uselang=fr