Can't upload a video

reversalmushroom

You're gay.
It won't let me upload this video: https://uploads.ungrounded.net/alternate/1146000/1146515_alternate_51726.1080p.mp4

For some reason 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 sha512 hash can't be blank"

Why is it saying all these things are blank like I'm uploading nothing? It's clearly a playable video that exists. How do I get it to upload?
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