Accidentally hit "X" on my mp4 file, mint hasnt started yet. Anyone know how to get it back?

So Im doing my first mint, and while editing the description, I accidentally hit the “X” in the top right corner of my mp4. Now the video file is gone and only the thumbnail is there. I can’t find anywhere to reupload in the edit window. Does anyone know how to get my mp4 back on the claim page?