2. Locate the GIF you want to upload, click on it, and then click "Insert." Check to make sure your GIF's file name ends in .gif – if it doesn't, PowerPoint will treat your GIF as a static image.

Just as you can save a file in GIF, you can save a presentation to MP4 format, which is the standard video format. For that, you need to choose the MPEG-4 Video option from the Save as type drop ...