The video mentioned that - in Germany at the turn of the century and particularly after WW I many secret societies developed. One of these groups was the Vril Society.
In 1917 four members of the Vril society met in a cafe in Vienna. There was one woman and three men. The woman was a 'spiritual medium'. They met under a veil of mystery and secrecy. They discussed secret revelations, the coming of the new age, the Spear of Destiny, the magical violet black stone, and making contact with ancient peoples and distant worlds.
Their source of power was the Black Sun, an infinite beam of light which - though invisible to the human eye - exists in anti-matter.
The Vril emblem became the Black Sun - a secret philosophy thousand of years old provided the foundation on which the occult practioners of the Third Reich would later build. The Black Sun symbol can be found in many Babylonian and Assyrian places of worship. They depicted the Black Sun - the godhead's inner light in the form of a cross. This was not much different from the German's Knight's Cross.
The woman allegedly channeled information from aliens after which the Thule was crteated. they went on to build something called the Vril Machine. It allegedly was a saucer shape interdimensional time travel machine. Their first flight was allegedly in 1934.
Thule Society members were allegedly the first group to attempt the back-engineering of an extraterrestrial spacecraft. "A German writer, John Von Helsing, describes the discovery of a crashed saucer in the Black Forest in 1936 and says that this technology was taken and combined with the information the Vril Society had received through channeling and was made into a further project called the Haunebu.
German aircraft historian Henry Stevens states, "Haunebu 1 was allegedlythe first large flying saucer developed in Germany. According to plans allegedly obtained from classified German SS files, the Haunebu 1 was approximately seventy-five feet in diameter and probably lifted off for the first time in August 1939, a few weeks before the outbreak of World War II.
Reference - UFO Sightings