If you're curious on what the antikythera mechanism is in a more practical sense, I can't recommend enough the ongoing clickspring project where they build one.
It's the reason he took a hiatus from filming, because he discovered this and had to write it into a paper rather than just talking about it on Youtube.
Huh, by coincidence the episode this month of a podcast I do on the history of astronomy happened to be on the Antikythera Mechanism so it has been top of mind for me. If you want to hear a little about the history of the discovery of this device the episode's page with a transcript is here: https://songofurania.com/episode/022
It's a fascinating device --- it's the earliest known geared mechanism in Europe. It seems to tantalizingly suggest that engineering in the late Hellenistic Era was much more advanced than we had previously suspected. It's just a shame that so much from that period has been lost.
https://www.youtube.com/playlist?list=PLZioPDnFPNsHnyxfygxA0...
Really fascinating and meditative video series, excellently filmed. Can not recommend it enough!