I've just pushed out Vijay's talk, the last from Day 1, to the DConf '23 playlist:
https://youtube.com/playlist?list=PLIldXzSkPUXWH97DYBENhAqLk4DUqKUmf&si=any30KpW1hAki1IF
Walter's talk will be up in a few days. I'll announce here again when all the Day 2 talks are up.
Enjoy!