Those many free days the workers had came as a courtesy of Catholicism. Look up the amount of regulation and holidays they had. This was, in fact, one of the reasons why Protestants were so comparatively successful. It was also part of the reason why they were resented in Catholic-majority countries; they got richer and were doctrinally snobbish about it. But I guess attacking Protestantism in favor of medical Caholocism would probably be the wrong sort of spicy for this YouTuber.
Regarding the structure of the workday. Modern-day physical labor still looks like this in many cases. Having worked over the summer in Landscaping and Carpentry this schedule is still present. And OP mentioned the case of office Jobs already.