I do not believe Lemmy internally handles things like gif or videos or photo album posts currently. To do that is best to just use a third party service and post the link to it. I'm sure other lemmings can point you to good services for this.
wait lemmy don't support album?, i did se albuns here
Tou can't do an album as the main post link, but you can embed multiple images in the post body.
If you put a direct link to a gif or video as the "link" of your post, I think it embeds automatically. But Lemmy right now does not support uploading videos directly.
Embedding works, yeah, but it has to be a direct link. Can't be youtube or such.
It technically does, it's just that not many admins would enable something like that considering how expensive in terms of both hardware resources and bandwidth serving videos would be.
One of the "editing" icons under the post/comment window will allow you to upload images directly to Lemmy. I suspect it would accept a GIF, but I haven't tried that. It does not currently support videos directly, but they can be done by linking to another source, as was already said.
Lemmy is built by volunteers and people are paying for servers out of pocket. Storage costs money so it's unlikely you'd ever see local hosting of large files like videos. Some instances will locally host files under a certain size limit, but it depends on the instance. There's plenty of third party file hosts so you can just upload your file to one of those and link to it.
People forget that when Reddit first started, it only supported link submissions and then later self submissions. That's how imgur got started - it was a gift to the users. It was only relatively recently when Reddit supported image and video hosting.
Those are all possible, the options on how to do each aren't clear or very versatile, yet.
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