They finally answered it: https://github.com/intel/thunderbolt-utils/ the repo is just gone.

Kagi shows a 4chan /g/ thread from February 24 ostensibly resurfacing the video https://i.imgur.com/wWnLEXL.png but that thread is gone too. https://boards.4chan.org/g/thread/99135291/intels-linux-thunderbolt-utils-code-is-the-worst