I'm getting "422 Error Processing Thumbnail For Uploaded Media" when trying to upload a screen recording.

I've tried .mov, .webm and .mp4 and it's all the same. Some of the files I tried are under a megabyte in size, so I don't think that's the problem.

Is this a known problem? Could someone try reproducing this?

Here's a file which I can't upload: https://drive.google.com/file/d/1uaefGFMMfoCVS-EjW-vbG7Pf9g0D1tVg/view?usp=share_link

Seems like it's a known problem:

https://www.google.com/search?q=422+error+processing+thumbnail+2023&client=safari&sca_esv=569170401&rls=en&ei=fZIVZfiOEM-Sxc8PgvmaoAk&ved=0ahUKEwi4wf_Txs2BAxVPSfEDHYK8BpQQ4dUDCA8&uact=5&oq=422+error+processing+thumbnail+2023&gs_lp=Egxnd3Mtd2l6LXNlcnAiIzQyMiBlcnJvciBwcm9jZXNzaW5nIHRodW1ibmFpbCAyMDIzMgUQIRigATIFECEYoAEyBRAhGKABMgUQIRigAUiyCVDJA1iPCXABeACQAQCYAawBoAHFA6oBAzIuMrgBA8gBAPgBAcICBBAhGBXiAwQYASBBiAYB&sclient=gws-wiz-serp#ip=1

@488cf7e2 sorry to bother you :p 

 @2e19db99 I found the underlying issue, describe in this ticket:
https://github.com/mastodon/mastodon/issues/22335

Since we use Scaleway, it was exactly our problem. I've now increased the 

S3_MULTIPART_THRESHOLD=5242880000

and now it works 🙂 

Thanks, Olav, for your bug report!