I’m pretty sure that’s Haim Bresheeth-Zabner, who wrote a really powerful and informative history of the IDF, starting with the paramilitary organizations that preceded it. (I strongly recommend it even if you don’t normally have much interest in military history or military-oriented histories! It’s as much or more about the role of the IDF in Israeli society/culture/ideology/education/propaganda as it is about the causes/trajectories/outcomes of battles and wars.))

He has a couple of YouTube channels (old, new), though only the newer one seems active. He has a lot of good interviews and lectures available in English on them, often together with other dissident Israeli Jews, like Shlomo Sand and Avi Shlaim.

Incidentally, I believe he is a Marxist, too. In his book, he talks about having been active in Matzpen, a defunct revolutionary socialist (and anti-Zionist) organization when he still lived in Israel.

Anyway, yes: extremely based.