So, your file is too heavy (that's what the page says as well). I have a paid version of NostrBuild (10GB/pro account) where I can store +publish different files, including bigger videos. A nice thing to have. Maybe consider getting the same for yourself. If you want me to help you once with this particular video, you can send me the file via email / SimpleX and I'll add it to a separate folder on NostrBuild and share the link with you.