Are you trying to upload?
Have you considered using markdown?
this post was submitted on 16 Apr 2025
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Test:
EDIT: Seems to work! Didn't realize I could embed videos like that, there's no shortcut in the browser UI.
I’m on Mlem (Mobile) through lemmy.world and you post looks like this:
Everyone else’s in this thread looks fine though.
Probably because it’s AV1.
I just noticed it doesn’t work on my IPhone (16) not even through the link: https://files.catbox.moe/foodzx.webm
But the VP9 one does. That's… Disappointing.
Works for me on Android
I figured. Works for me on desktop linux too.
AV1 support is just one more of those things Apple has been dense about.
Doesn't work for me:
No video with supported formate and MIME type found.
code "validate-file-size"
msg "Resonse body larger than size limit"
*on sopuli.xyz
It works on my lemmy.ca account tho, but only after I enable java scripts for the video embeds.
You mean you can't see the embed in the above comment? What client?
Certain client work and some don't. Jeroba does not work but Firefox does.
I'm on firefox lol, but through Ubuntu snap... ¯\_(ツ)_/¯
Firefox browser 137.0.2 (64-bit) (snap), Ubuntu 24.10.
Upload it to catbox.moe instead and then hotlink it to here
Yeah, I guess a link is fine, but can I embed them somehow?
EDIT: Embedding seems to work.
You generally can embed them the same way as you would a gif with the ![]() format
That's how I just embedded this mp4. Works fine on desktop/web, is a bit broken for phone apps, depending on the app.
Still, maybe Lemmy.world (and other instances?) should allow uploading of videos that are about the size of images. Maybe a limit of 768KB?
You should probably talk to the devs, as I'm pretty sure this is just how Lemmy works. It's not very format-friendly, on any instance. But then I think they want to center text as more important than images/video.
Also, storage space is expensive, so I think they're trying to minimize impact to admins who have a bunch of throwaway media uploaded to their servers to be viewed once and then never again.
Github issue then? M, okay.
That's a great thing about Lemmy I suppose, there's somewhere to go to discuss features that isn't a black hole, lol.
For reference, here's an example
A quick VP9 webm video, 1920x1080, 2.8MB: https://files.catbox.moe/l5yvor.webm
A smaller webm, 1920x1080, 1.1 MB and still looks fine: https://files.catbox.moe/foodzx.webm
The GIF. 400x225, 12FPS, 5.6MB, optimized as best I can yet looks like a can of spam. But it's what Lemmy would take:
Is this from Avatar?
Yeah, Book 3 of The Legend of Korra. That whole season is solid gold.
A longer clip with sound: https://files.catbox.moe/8z5ggp.webm
I had no problems uploading animated webp so this is propably Lemmy.world limitation
Interesting. That's what I was afraid of.
I guess I need to make a Lemmy.world support thread for that?
I've only seen the .gif file format functions when embedded on Lemmy, but I also only really use an app to browse. And uploading one can be a PITA because there is a file size limit on most instances that is pretty small. Linking to them off-site and then just adding an exclamation point (!) at the front of the link will embed it. Like so:
