The concept of extraterrestrial souls incarnating in human bodies did not come from harmless ladies on YouTube in 2016 or whatever. It can be traced back to at least the early 20th century, when William Walker Atkinson, theosophist and New Thought believer, wrote this in his book A Series of Lessons in Gnani Yoga: The Yoga of Wisdom:
Those individuals of a race who have outstripped their fellows in spiritual unfoldment, are still bound by the Karma of the particular race to which they belong, up to a certain point. And as the entire race, or at least a large proportion of it, must move forward as a whole, such individuals must needs wait also. But they are not compelled to suffer a tiresome round of continued rebirths amid environments and conditions which they have outgrown. On the contrary, the advanced individual soul is allowed to wait until the race reaches its own stage of advancement, when it again joins in the upward movement, in full consciousness, however. In the interim he may pass his well earned rest either on some of the higher planes of rest, or else in conscious temporary sojourn in other material spheres helping in the great work as a Teacher and worker for Good and Spiritual Evolution among those who need such help. In fact there are in the world to-day, individual souls which have reached similar stages on other planets, and who are spending their rest period here amidst the comparatively lower Earth conditions, striving to lift up the Earth souls to greater heights.
Later, but still pre-YouTube sources of this stuff includes:
Other Tongues - Other Flesh (1953)
Gods of Aquarius (1976)
The Star People (1981)
The Ra Material (1984)
(Older materials frequently refer to these kinds of beings as “wanderers” or “star people.”)
So there you go. The concept of alien souls incarnating on Earth to help humanity ascend sure as hell isn’t ancient, but it definitely isn’t recent, either. This is why I’m telling folks to do the research. Find people’s sources, find their sources’ sources, and find out where shit actually comes from.