Trying to pack 1000 years of history into a one hour program is setting oneself up for failure from the start.
In this production, we learn little about social or political organizations and absolutely nothing about the daily lives of people, the technologies available to them and how those developed and improved over the years. We don't get as much as a hint at which crops they grew, how they grew them, how they stored and prepared food, built their homes and other structures, made clothing, treated injuries and illnesses, or defended themselves against wild animals.
Instead, we are treated to the usual "the Dark Ages were filthy and violent" fair, complete with detailed descriptions of torture. We witness the same mutilations and executions time after time, hear the same screams over and over, and see the same battle scene reenactments again and again (complete, as another reviewer pointed out, with cavalry using historically inaccurate gear, such as saddles, horseshoes and stirrups). Unfortunately, we don't get much information about why these people fought, and this leads me right back to the start of this review: It is impossible to give more than the most superficial overview of 1000 years of history in one hour.
This low-budget program does not educate viewers. All it does is depict popular prejudices against the Middle Ages.
If you want an educated introduction into this fascinating time period, including its innovations and progress, you will have to pick up a book. My personal favorite is Morris Bishop's "The Middle Ages".