The issue is resolution, screen vs print, your video is something like 1024x576 pixels, or any one of the multitude of dimensions, print requires 200/300dpi depending on the print method, inkjet/laser/offset.
So you are creating a DVD slick, 27x18cm-ish, each face is about 13cm wide and 18cm high, at 300dpi you need to be supplying a file that is 1535pixels x 2126pixels. How to do this?
Take your motion motion project, save it as print version, change the project settings to reflect your desired output size and create your new masterpiece.
hope this idea helps
Tony