Your catch proves that issue is not remotely settled, and to my mind, indicates that more rigorous counsel with historians will only add depth to debate, rather than resolve it.
I would suggest UncleMeat just advocate that people like Jonathan Blow take the history out entirely, and argue why this contemporary technology isn't good enough relative to our resources and skills.
Arguments about sourcing feel like face saving rather than legitimate criticism of the view bought forward by UncleMeat. After all the original video is completely unsourced but apparently beyond reproach in that regard. Also where we have sourcing (for example the Dark Ages wiki) it only strengthens the point made by UncleMeat as they were indeed correct about the views of historians.
More broadly if we want discussion to be well sourced we shouldn't apply that selectively and in particular selectively against the people who disagree with us.
I'm not interested in getting suckered into believing some randall carlson gobbledygook, the type I might leap to assume UncleMeat would find quite problematic.
I just think UncleMeat initially came in, said something along the lines "this is bad, don't do this, ask people who know better" and it has been made clear they had the capacity to contribute more that what read to me as nothing more than the logical fallacy that is an appeal to authority. They have clarified their position enough to where I can no longer be left with such impression.
To quote:
"Science historian David C. Lindberg criticised the public use of 'dark ages' to describe the entire Middle Ages as "a time of ignorance, barbarism and superstition" for which "blame is most often laid at the feet of the Christian church, which is alleged to have placed religious authority over personal experience and rational activity".[52] Historian of science Edward Grant writes that "If revolutionary rational thoughts were expressed in the Age of Reason, they were made possible because of the long medieval tradition that established the use of reason as one of the most important of human activities".[53] Furthermore, Lindberg says that, contrary to common belief, "the late medieval scholar rarely experienced the coercive power of the church and would have regarded himself as free (particularly in the natural sciences) to follow reason and observation wherever they led".[54] Because of the collapse of the Western Roman Empire due to the Migration Period a lot of classical Greek texts were lost there, but part of these texts survived and they were studied widely in the Byzantine Empire and the Abbasid Caliphate. Around the eleventh and twelfth centuries in the High Middle Ages stronger monarchies emerged; borders were restored after the invasions of Vikings and Magyars; technological developments and agricultural innovations were made which increased the food supply and population. And the rejuvenation of science and scholarship in the West was due in large part to the new availability of Latin translations of Aristotle.[55]"
ETA: Also didn't realise you're the same person I replied to below!