In Microsoft PowerPoint, in order to have a moving background or an animated background, you can use short video clips from your video files or the internet. How do you make a PowerPoint animated?

When using Microsoft Office 365, you can make your title slide a looping video by using Design Ideas on the Home tab in PowerPoint. The title slide below with falling snow in the background was ...

Launch Microsoft PowerPoint, and open the PPTX file for which you want to use a GIF as the background. Select the appropriate slide. Click the "Design" tab, and locate the "Background" section.