You have to have a direct link to the .gif image. I’ve tried with imgflip gifs before but they make it hard to find the direct link. You have to take the link they give you and reformat it.

The link they give you (with added spaces so it doesn’t render). This one results in it showing the link/frame:

https:// imgflip. com/gif/ 7gxok1

The reformatted direct gif link that they hide (with extra spaces so it doesn’t render):

https:// i.imgflip. com/ 7gxok1.gif

And here’s that reformatted link if I paste it. It should display just the gif with no frame or link: