Looking for yourube channels that explain the history behind the construction of medieval buildings but also explain the parts that make up those buildings (for example explaining what an arch is and what it’s function is) amd analyse the buildings from a structural engineering viewpoint in an easy to understand and digest format
Not really a channel dedicated to it but there seem to be a lot of episodes of secret of the castle on YouTube. There was a castle being built using period accurate techniques and they filmed a documentary while they were constructing it.
Guédelon Castle in France.
OP, you could start by looking up videos about that