Have you seen this documentary on the Holy Grail?

I saw only the ending of this documentary, as I arrived late to it when it was on, or I changed the channel to it after becoming interested in it. I had moved to Canada the previous year and I was 9 if you want to know. It was either on the History Channel, Discovery Civilization, or the National Geographic Channel.

All I remember from it is the narrator, who sounds like the narrator of the Oka cheese commercials (“the monks from Oka, Quebec…”) talking about the Holy Grail, I can’t remember what, across a green backdrop outside, and then saying that the creator of the Holy Grail (those name I learned years later on Wikipedia in 2011 or 2012 was Chretien de Troyes) or the writers of the Holy Grail romances – I can’t remember which of the two possibilities it is – never intended it to be taken as history, across a green backdrop in front of a field where a large tree was, with a forest in the distance, or in between part of the ruins of the walls of a castle in front of a field or overgrown courtyard, where the walls extended, where a large tree was.

At the time, I assumed this meant that they were writing novels rather than history, but in retrospect he might have meant they were writing legends or Christian morality tales or parables. Anyways, immediately afterwards, this white man with a North American accent saying “Imagine if a thousand years from now people will think that Lord of the Rings was real and that there really was this place called Middle-earth.”, followed by him saying something else related to the Holy Grail – I can’t remember what.

This was followed by the narrator again talking about the Holy Grail, again in the castle ruins or the green backdrop, or maybe somewhere else that was green outside (not the previous green backdrop which was the first that I saw), and then the credits ran, I am not sure against the same background or against blackness.

Please, can you tell me what this documentary on the Holy Grail was?