The video correctly describes a core Latter-day Saint belief about the Godhead, but its conclusion that this makes the faith “satanic” is a subjective attack, not a factual claim.
Claim-by-claim breakdown
Accurate (92% confidence): The people in the video are missionaries from The Church of Jesus Christ of Latter-day Saints. The transcript says they are “missionaries for the Church of Jesus Christ of Latter-day Saints.”
Accurate (98% confidence): Latter-day Saints believe the Father and Jesus Christ are separate beings and are one in purpose, not literally one being. Official LDS sources say the members of the Godhead are “three separate beings” and “one in purpose and doctrine,” and that they are not the same being or substance as in traditional Trinity theology.
Misleading (74% confidence): Calling LDS doctrine 'satanic' because it differs from traditional Trinity doctrine is a factual claim. The claim is value-laden and depends on the speaker’s beliefs; it cannot be verified as a factual statement.
Unsupported (88% confidence): Any religion that does not say God and Jesus are one is helping Satan. This is a belief-based condemnation, not a checkable factual claim.