Not bad for a first outing! A couple of nasty typos in the early part of the video. I'm not going to tell you what they are, since you should have caught them before posting the video - that's a critical part of any production in which typography plays a large part.
Other than that, I would suggest maybe a bit more subtle sell early on: maybe something in the terra cotta section that asks "who cleaned all these statues?", or "cleaning the Colosseum must have been quite a job!". I don't think it would be out of place, since the piece is light-hearted.