After upgrading to a paid plan, you will need to open your video for editing and export it again to remove the watermark. Exporting is what applies the most recent changes to your video, so the paid features will not apply until it is exported again. Click Edit Video or Continue Editing from the Projects page, then export your video as you did the first time to remove the watermark.
If you recently upgraded your subscription, and your video still has the watermark not to worry! You need to export your videos again to reflect your updated subscription.
To export an updated version without the watermark, hover your mouse over the video and click Edit Video on the My Projects page to open the Workspace.
From the Workspace, click Share and select in the upper right corner and select Publish and Share from the dropdown menu. to make a new copy of your video, select how you want to share, and you’re set! The watermark will now be removed from your video.