To uncover a deepfake video call, ask the caller to turn sideways
What's with everyone playing who-wants-to-be-a-gymnast by saying turn side ways, put a shoe on your head, do a backflip, move out of frame.?Encrypt/sign the feed, watermark the images with a QR code containing the sig, have an app on your phone with their pubkey and display a big green check when it matches. every pure deepfake attempt is now easily dealt with. Boom.