Once you've exported your video, it would show up on the video preview page with Typito branding on the top left:
You can remove the Typito logo branding by clicking on the 'Remove' button on the bottom left of your screen. It would open up a popup flow that would ask you how to remove branding - by paying $15 for the particular project or by buying one of the subscriptions on Typito:
Once the logo is removed, the video will show without the Typito logo in it.