Seventh-day Adventism—The Spirit Behind the Church

Chapter 22—Jehovah’s Witnesses derived from Adventism; their founder Charles T. Russell co-authored a book with N. H. Barbour, an early Adventist.

Answer:

By using the broad term “Adventist” the video leaves the impression that there is a connection between Jehovah’s Witnesses and Seventh-day Adventists. Nelson H. Barbour was never a Seventh-day Adventist. He was an Advent Christian. SDASBC 8.4