Edit: this is the same as the series posted above.

There's a whole BBC series from 2014 about Guédelon, too.
https://en.wikipedia.org/wiki/Secrets_of_the_Castle

Would love to visit sometime.

ICYMI: Tom Scott's treadmill crane video at Guédelon!

I’ve been and it’s worth it! Fun for the whole family too.

From Alan Taylor at the Atlantic, Photos: Building a Medieval Castle in the 21st Century.

Archaeology Magazine: How to Build a Medieval Castle.

"At Guédelon, we're looking for what disappeared in traditional archaeology," says Florian Renucci, the master mason and longtime site director at Guédelon, who was formerly a researcher at Sorbonne University. "Experimental archaeology means bringing to life what workers can do. We're always looking, hearing, feeling. Now, with our work, the castle can speak."

The first thing the castle said about windows is that they couldn't have been made of glass. Guédelon's artisans and committee of scientific advisers are constantly scouring medieval texts for clues about how thirteenth-century builders would have handled such details. In the castle's imagined backstory, the fictitious seigneur, or lord, of Guédelon was a cash-conscious minor noble trying to make a home in 1228, putting him — and today's builders of Guédelon — at the mercy of his financial circumstances. In that era, glass was extraordinarily expensive and reserved for places of worship and royal residences. Glasswork, the team learned, swallowed up half the cost of building a cathedral. Unfortunately, whatever material was used to fill the window frames of lesser edifices has left no traces in the archaeological record.