So, a bit of pedantry that often doesn’t matter but may be useful to be aware of:

We don’t actually want anyone using “GIFs” anymore. It’s a very inferior format that doesn’t load well on phones. It’s a handy term that can refer to silent looping clips - but most of the time even when they’re in use, they’re done as muted video links. Some sites call these GIFVs or whatever else.

So if you have an mp4 video that you think would be funny muted and looping, don’t try to convert it to GIF, just see where you can upload and embed it. Granted, it sounds like Lemmy still has issues on the embedding bit.

I think you might have better luck uploading them in webp format.

Same, kinda missing all the videos and gifs from that other place