How to block your face with an expression pack in an Apple video?

Do something like imitate my expression.

Open the SMS, find the camera on the left to send the SMS, open it, select Video Recording, click on the lower left corner to select Imitate my expression, and you can record a video imitating me and save it in the photo album. Apple store downloads the vertical lens, imports the video, and uses the vertical lens filter to make it look like you said.