Click Share in the vibrato video, and in the dialog box that pops up at the bottom, there is a share to WeChat.
The second method is to click the share button and save it in the photo album at the bottom, then the video will be downloaded to your mobile phone photo album, and then you can open WeChat to send the video.
The third method: When the video owner sets the video as unable to save and share, then you can record it on the screen, and the recorded video can be displayed to your friends through WeChat.