re: The most watched film of all time....

My knee-jerk guess was "It's a Wonderful Life" or "Miracle on 34th Street", something that airs non-stop in the two weeks leading up to Christmas. I think that's just an American thing, though, and I'm guessing that that they don't air on heavy repeat like that in every Christian country on the planet. Further, the majority of the people on the planet don't live in Christian countries, so it's likely they've never even heard of those movies.

The more I think of it, worldwide's gonna be something like Wizard of Oz, Casablanca, Star Wars, etc. Something massive with worldwide appeal that's had decades to be viewed over and over.