Here are the common reasons why a watermark appears on your video:
Using the Free plan
Videos exported under the Free plan will include a watermark, which cannot be removed due to copyright protection.Exceeding Plus plan limits
If your project includes elements that go beyond the limits of the Plus plan, a watermark will also be added.
How to remove the watermark:
Click the Export button to see which limit has been exceeded. Then follow the on-screen instructions to adjust your project accordingly. Once all elements are within your plan limits, you’ll be able to export the video without a watermark.
Example for reference:
Also read: What does stock video mean?