Adding watermarks to videos can be done in WeChat.

1. First, open the WeChat interface on your mobile phone and click on the search keyword "add watermark".

2. Then click search according to the prompts to display the "Video Watermark" applet, and click directly.

3. Then click to upload the video, select a video that needs to be watermarked, and click "" to automatically upload it after completion. There are "Text Watermark", "Image Watermark" and "Video Replacement" below the video. Select "Text Watermark" to add watermark to the video, and select "Picture Watermark" to add watermark to the picture. Users can choose according to their own needs.

4. Finally, adjust and modify according to your own needs. After the adjustment and modification are completed, check the box and click "OK" to save the video or save the picture.