This is almost certainly an abbreviation for "update" or "updated." In content management or database contexts, "upd" indicates that the record (the video title, metadata, or file) has been modified, re-uploaded, or refreshed.
If you ever had the original URL, paste it into web.archive.org. Even if the video is gone, the page title containing “[sic]” might be archived. video title sic nathan luna danny delano upd
The original video was removed by the creator or platform. “UPD” re-uploads (mirrors) are often posted on alternative sites like Odysee, Rumble, or Internet Archive. This is almost certainly an abbreviation for "update"
Given that this appears to be a fragmented search query or a technical note (indicated by "[sic]" and "upd"), this article will break down the possible meanings, context, and how to interpret such a string. or file) has been modified