1. Click on the three dots in the upper right corner of the video details page, and then select "Download and Share" to save the video to the album, but the video downloaded in this way may be watermarked.

2. Use a third-party download tool. Such as watermark tool+,document, etc. These tools can help download videos and delete watermarks. First, find the corresponding watermarking tool in the WeChat applet, then paste the link of the video into the tool, download the watermarked video, and then save the video to the photo album.

3. Use the video clip application to merge the cached videos. Install a video editing application (such as editing) on the mobile phone, then cache the video in the storage of the mobile phone, find the cached video file, merge the video and audio files with the editing application, and convert them into a format suitable for playing on the mobile phone, so that the processed video will not carry the watermark.

4. Use a video decoder. Download and install a video decoder (such as VLC or MXPlayer), import the cache file of the video, select the output format and storage location, and start the decoding and transcoding process. When finished, you can find the transcoded video file in the photo album.