Can't upload video to file manager

[dreigonnadoit]

Every time I try to add a video for my header page background, it keeps not uploading.
I can see the download progress bar, but nothing appears after it is done loading. How do I fix this?

http://dreiprojects.42web.io/Pages/header-page.html

[KangJL]

Use filezilla

Take note of file size limits

Why are my files deleted after uploading them

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