He claims he was explaining what others believe not what he believes
Others as in specifically his co-writer for AI2027 Daniel Kokotlajo, the actual ex-OpenAI researcher.
I'm pretty annoyed at having this clip spammed to several different subreddits, with the most inflammatory possible title, out of context, where the context is me saying "I disagree that this is a likely timescale but I'm going to try to explain Daniel's position" immediately before. The reason I feel able to explain Daniel's position is that I argued with him about it for ~2 hours until I finally had to admit it wasn't completely insane and I couldn't find further holes in it.
Pay no attention to this thing we just spent two hours exhaustively discussing that I totally wasn't into, it's not really relevant context.
Also the title is inflammatory only in the context of already knowing him for a ridiculous AI doomer, otherwise it's fine. Inflammatory would be calling the video economically illiterate bald person thinks evaluations force-buy car factories, China having biomedicine research is like Elon running SpaceX .
(No spoiler tags because it's just background lore for Dune that's very tangential to the main plot)
That's a retcon from the incredibly shit Dune-quel books from like 15 years after the original author had died. The first Dune was written well before computers as we know them would come in vogue, and the Butlerian Jihad was meant to be a sweeping cultural revolution against the stranglehold that automated decision-making had achieved over society, fought not against off-brand terminators but the entrenched elites that monopolized access to the setting's equivalent to AI.
The inciting incident semi-canonically (via the Dune Encyclopedia) I think was some sort of robo-nurse casually euthanizing Serena Butler's newborn baby, because of some algorithmic verdict that keeping it alive didn't square with optimal utilitarian calculus.
tl;dr: The Butlerian Jihad originally seemed to be way more about against-the-walling the altmans and the nadellas and undoing the societal damage done by the proliferation of sfba rationalism, than it was about fighting epic battles against AI controlled mechs.