Confirmation that Rome never fell, you can follow the line of succession of Popes right back to Constantine, it was just a slow transferal of power to the Catholic Church and then they just ruled from the shadows and still do.
She even admits that they don't really know why Rome collapsed and most accounts of what happened were written by Christians. The victor has literally re-written our history books and nobody even questions the organization that has survived intact for 1700 years.
Interestingly she never mentions the Roman Catholic Church even once in this documentary, just uses the ambiguous term of "Christians".