If you are on the Freemium Plan:
The Synthesia logo (watermark) will appear on all videos created with your account. To remove it, upgrade your subscription and re-generate the video.
Using the API? Here's why a watermark might appear:
The presence of a watermark depends on how you've configured the test parameter:
When
testis set to true, the video will include a watermark, but no video minutes are consumed.When
testis set to false, video minutes are consumed, and no watermark should appear.
For more details, see the test parameter guidelines.