Can I remove an element from the video?

How to disable a media placeholder and just show the background?

Customizable elements in the video (logos, photos, text) can usually be removed from the video. You can do this in the same dialogue box in which you upload an asset. 

For example, let's say you want to hide the logo in the final scene of a slideshow and only show the tagline — click on the logo placeholder and look for the eye symbol in the box's upper right corner. This will hide the logo in the video and show the background.