See:
When some images are shared on Discord via their GIF function a nice simple GIF is displayed. Example:
URL: Hâm Frog Toad GIF - Hâm Frog Toad Frog - Discover & Share GIFs
Screenshot:
This URL is rendered with text and not just the image (arguably much less effective) in Mattermost:
Can Mattermost be made to render the image like Discord does it with just the image and no text in such cases?