Video frames can be composited to improve clarity the same way it is done in Astrophotography. And your assertion that "any software technique...won't look lik

Video frames can be composited to improve clarity the same way it is done in Astrophotography. And your assertion that "any software technique...won't look like the face" is incorrect. Again using multiple frames, it's entirely possible to infer what clearer underlying detail would result in the less-sharp pixel values in the video, given the training data establishing the relationship. It's a specific technique for reconstruction, not just drawing in a realistic but synthetic replacement like Photoshop's content-aware fill.