Ironically, if a job's workload starts to require fewer people, it's often harder for any individual to step away. In the past, there were more people working a plot of land, so there was more ability to cover for people stepping away. Now with only one person doing all the work, that person can't take time off or the whole thing collapses.

The narrator makes the point that there wasn't much else for a medieval peasant to spend their money on besides food, shelter, and clothing. If you want to subsist on vegetables and porridge, in a small home in a tiny rural community, wearing basic clothing, you wouldn't have to work many hours to get by.

The other element is that medieval Europe experienced a huge labour shortage following the Plague. Owners weren't allowing workers to work less because they were nicer in the medieval period. They had no choice. Exploitative 18th and 19th century capitalism coincides with a massive increase in population, which decreased the power of the individual worker, at least until unions became a thing.

On farming specifically, are you American? American farming is extremely inefficient and unproductive. "Family farming" is not usually an economically sustainable farming model. Throughout history, collective farming with a larger labor pool is much, much more common, and family farms only show up under very specific conditions -- when land is very cheap. American land use programs were purposefully designed to displace indigenous people first and farm second. The government made the land cheap (or free) to entice farmers to move into it. As a result, we've inherited a family farm system that no longer makes sense, and we're struggling to figure out what to do.

Sarah Taber writes about this a lot: https://nymag.com/intelligencer/2019/06/america-loves-the-idea-of-family-farms-thats-unfortunate.html

On your general point, on how much is true, I've read a lot of criticism of this video, and I think most of it comes down to interpretation. What is free time? A lot of people criticize the video for not acknowledging that peasants had to work outside of the time they were working for other people, but so do we. Our lives are very different from theirs, and it's just really hard to compare.

For example, when I say I spend a lot of my free time renovating an old house I'm fixing up, that sentence makes perfect sense, but I'm implying a very specific idea of "free time" that's actually a little weird, when you think about it. Right now, I'm spending my free time writing this, but to a many a peasant, I assume writing was probably serious work done by serious people with specific training, not something they would consider a leisure activity.