Okay I have actually read the post / watched the video now - great video, really high production values. The same video, if cross-posted here on Steemit the same week it was released on youtube, would be worthy of submission to Curie.
On the other hand, posting a video here that was posted back in December on Y outube, particularly when there is no link back to Steemit on their Youtube page, actually hurts Steemit. This is not what we want to reward with upvotes. This decreases Steemit's visibility in search engines - there is a link back to Youtube here, but there is not a link back to Steemit on the Youtube page, and the content was posted first there - this all adds up to hurting Steemit's search engine visibility. I left a comment to the author asking them to consider cross posting when their content is fresher, and also leaving a link back to Steemit.
The quality of the post is great though.
Cheers - Carl