Technically, Piped is not just a frontend... How about setting up a redirect? I used to provide links to piped.video like the annoying bot but then I realized it's decentralized and everyone using Piped probably has a redirect (or link-handling app) set up to their preferred instance.

BTW, there's an Internet Archive mirror of the video available as a plain file or in their online player The reference is at 9:57 but the whole thing is worth it.