Somehow OP must've linked to the RDCWorld video by mistake and somehow this still got to the top of HN?
I guess HN just upvotes without clicking the link?
Uhh isn't that a big flaw with HN if you can?
(for example, link to a blog post that would be popular with the community to get upvotes, then switch it up for your own company blog or something to get the traffic)
Submitters can't change URLs once they've submitted.