I distinctly remember, circa 2005-2009, seeing (parts of) a live-action TV show, almost certainly on YTV, in which a Knight of the Round Table is brought forward into the present day, and sees a trophy (possibly the Stanley Cup) on television, which he becomes convinced is the Holy Grail. The only kids' time-travel show I'm finding from the era is Timeblazers, but I remember this show being in a less documentary-like format (based on the handful of episodes uploaded to YouTube by one of the actors), more going for comedy.
This was almost certainly just the premise of a single episode. I remember there being some kind of time machine troubles. It may not have been on YTV, because I think I remember seeing it at some wealthier friends' house.