The proportion of short video with vibrato is 16:9, which gives people a sense of comfort.

The proportion of audio and video is generally 16:9, because Tik Tok's words are from an er platform with a vertical screen, which is more comfortable to watch. If it is a horizontal screen, you have to turn the phone upside down, which is not as comfortable as a touch screen. So Tik Tok's words are 16:9, which is better, but very comfortable.