1, watermark the video, that is, add an icon and text to the video and add a unique logo to the video.
2. Whether the video is clear after adding the watermark depends on the quality of the video source before adding it;
3. The added video quality cannot exceed the video source, and the best case is to keep the same level as the video source;
4. Next, it depends on whether the video source is set to reduce the image quality when adding the watermark;
5, then, it depends on the ability of video processing software, and some bad software will also lead to reduced image quality;
..... "If I can help you solve it, please feel free to adopt it;