Well; since EVERYTHING in the video can be found in MORMON publications; what do YOU think?
In a simplistic and paraphrased way, yes.
Although stating that all mormons believe this would be a bit of stretch because I don’t believe all mormons know half of this.
Mormons are taught not to perform independent research outside of Mormon circles, venues or publications because it could “damage their faith”.
This would explain why many of these beliefs and teachings are unknown to many.