There was no recording at the event.
You can find the slides here: "slides-delta-t.odp".
Here's some resources related to the Delta-T protocol: "delta-t-paper-1978.pdf", "delta-t-paper-ien193-1981.pdf", "delta-t-paper-1989.pdf", "delta-t-protocol-spec-1981.pdf".
I gave this talk at the second edition of Open Computing, in June 2026, in Montpellier, France. I was the main organiser of the first and second editions, and also the president and secretary of the students association that organised it (Hello World, hosted at the faculty of science).