Why is the free preview video low resolution?

Previews are produced at a maximum resolution of 540p.

As you make changes to the original design, Videobolt automatically renders a preview video with your changes applied. In order to make this process as fast as possible we render the previews at a low resolution of 270p, though you can raise this to 360p or 540p if you don't mind waiting longer for previews. 

Every time you make a change, a new preview video is produced so you get almost instant feedback on how your project is evolving. When you’re happy with your project, you can use a subscription to export the video in the highest possible quality (from 720p HD to 4K UHD ⁠— depending on the template and subscription plan) and download it with no watermarks.