1, the small video shot by WeChat uses a special encryption format, which cannot be read and saved by other software, and needs the help of third-party software for format conversion.

2, you can solve this problem with the help of mobile phone housekeeper.

Open the mobile phone housekeeper-clean up and speed up-slim down the mobile phone-WeChat video

Save to an album-Open the WeChat circle of friends-Click the photo button in the upper right corner-Select a small video in the album when adding a picture-Publish.