In the video I posted first (22 min), Sylvie shows that the 2 headed eagle symbol was used as a national emblem by every country in Europe and others around the world.
The basic premise of her work is that there was a worldwide culture not very long ago, and based on the work of Anatoly Fomenko who's books scientifically show, by comparison of recordings of historical celestial events, eclipses especially, and the actual provable dates when eclipses have to have occurred, that there is about a 1000 year discrepancy in history, that the Middle Ages, or Dark Age where made up and didn't happen, at least not when they are purported to have.
She believes the Earth has been conquered by a group she calls The Parasites who have methodically wiped out all peoples and cultures around the world with a memory of how we lived in peace and prosperity worldwide very recently.
In this video posted here she shows the physical evidence of art and artifacts that demonstrate that Christianity and Islam were actually the same religion and co existed relatively peacefully in Europe until the conquest by the Parasites.
(old version) the survivors, 8 - the Stolen History of the Religions
https://www.youtube.com/watch?v=A3d2fn_3hWI&index=9&list=PL413kttcyah5B_NDzyJ5FNpecUc3e__DK&t=0s