This does not work at all with images of real faces. I uploaded a few selfie images of my face. It either failed to detect a face or heavily warped my face like the sad face Snapchat filter [0].
I upload one demo video, it will act as the facial expression vividly.... I thought it nice a tool, it's free to use. if it will provide more facial will be better.
Also. I use ai generated picture to upload to do face animation. pretty well. I will recommend it.
[0] - https://popcrush.com/how-to-crying-filter-snapchat-tiktok-sa...