What happened to WeChat playing video balloons?

Playing video balloons on WeChat is a dynamic special effect of WeChat video. On the "My" page of WeChat, there is a "camera" icon at the top. Clicking the icon will enter the shooting interface. In the shooting interface, long press the shooting button will shoot a short video, click "That's it", and the shot short video will be used as the background of the current dynamic. When other non-friends are making video calls with themselves, the balloon special effects fluttering in the picture are the epitome of their previous video dynamics.