Facial metric privacy in videos refers to the protection of an individual's facial features and measurements when they are captured on video. This includes things like the shape and size of their face, the distance between their eyes, and any other unique features that could be used to identify them. Facial metrics are often used in facial recognition technology, which can be used to identify individuals based on their facial features. While this technology can be useful in some contexts, such as law enforcement, it also raises privacy concerns.