Yes you are right. Good detective work.

It turns out the vimeo video I linked to was private. It was sent to me by a video editor on upwork who I am paying to add B-Roll etc. into it.

I will have to resubmit... perhaps after uploading everything to a YouTube channel.

Also, the user has uploaded the video two months back and then made another updated video a month back. So I guess, it is another updated video for this month that he intended to share.