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Webm Uploading issues (NSFW)

Calypso The Zebra Hybrid

You mods need to figure out what is wrong with this stupid upload system of yours. No matter how many times I try, the webm upload says:
 
Image can’t be blank  
Image size can’t be blank  
Image width can’t be blank  
Image height can’t be blank  
Image mime type (video/mp4) is invalid  
Image duration can’t be blank  
Image orig sha513 hash can’t be blank
 
I need an explanation as to why and I need it fixed. I can’t utilize the sight’s upload system if it stubbornly refuses to let me… sorry if I sound passive aggressive. It’s just happened so many times at this point…
Vauria

Image mime type (video/mp4) is invalid
 
That looks like all you need to know right there. You’re uploading an MP4 instead of a WEBM. Since those are unsupported, it can’t verify that anything else about your file is valid.
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