The most recent video in that playlist was uploaded in December 2020 https://www.youtube.com/watch?v=MkKgdq57uOo&list=PLZioPDnFPNsHnyxfygxA0to4RXv4_jDU2&index=1

The most recent video in that playlist was uploaded in December 2020 https://www.youtube.com/watch?v=MkKgdq57uOo&list=PLZioPDnFPNsHnyxfygxA0to4RXv4_jDU2&index=10 https://www.youtube.com/watch?v=MkKgdq57uOo&list=PLZioPDnFPN... (before that the previous video was from October 2018; maybe you meant ~3 years ago) There is also an 'antikythera fragments' playlist with the most recent video from September 2021 https://www.youtube.com/watch?v=BLBDKmFG90U&list=PLZioPDnFPNsGnUXuZScwn6Ackf6LGILCa&index=10 https://www.youtube.com/watch?v=BLBDKmFG90U&list=PLZioPDnFPN...