If you are uploading your video to Facebook, Instagram or YouTube, it will let you add a thumbnail directly on the platform. Rocketium doesn't have this feature enabled currently.
If you're looking to explore how to add thumbnail to Facebook, Instagram or YouTube give the article below a read:
- Uploading a thumbnail to Facebook- https://tubularinsights.com/change-facebook-video-thumbnail/
- Uploading a thumbnail to Instagram- https://www.kapwing.com/resources/adding-a-custom-cover-to-an-instagram-video/
- Uploading a thumbnail to YouTube- https://support.google.com/youtubecreatorstudio/answer/7024632?hl=en