Here are the Watchtower quotes in case you missed them in the video:
*** w81 5/1 p. 17 par. 3 If God Has an Organization, What Is It? ***
Let the honest-hearted person compare the kind of preaching of the gospel of the Kingdom done by the religious systems of Christendom during all the centuries with that done by Jehovah’s Witnesses since the end of World War I in 1918. They are not one and the same kind. That of Jehovah’s Witnesses is really “gospel,” or “good news,” as of God’s heavenly kingdom that was established by the enthronement of his Son Jesus Christ at the end of the Gentile Times in 1914. (Luke 21:24)
*** w82 5/1 p. 10 par. 8 Why Pray, “Let Your Kingdom Come”? ***
of all religions on earth, Jehovah’s Witnesses are the only ones today that are telling the people of earth this “good news.”
*** w67 12/15 p. 753 par. 1 What Now Distinguishes the Good News to Be Preached ***
What vital thing has now been added to the good news of the kingdom of God that Jesus Christ and his zealous apostles used to preach nineteen hundred years ago? This, namely, the birth of God’s Messianic kingdom in the heavens at the end of the Gentile Times in 1914.
*** w86 4/1 p. 31 Questions From Readers ***
Approved association with Jehovah’s Witnesses requires accepting the entire range of the true teachings of the Bible, including those Scriptural beliefs that are unique to Jehovah’s Witnesses. What do such beliefs include? ... That 1914 marked the end of the Gentile Times and the establishment of the Kingdom of God in the heavens, as well as the time for Christ’s foretold presence.
*** w85 9/1 p. 25 par. 15 God’s Ministers Prove Their Qualification ***
So Christendom’s clergy refuse to take a stand for Jehovah’s Kingdom by Jesus Christ. For failing to support it, they will be destroyed in the “great tribulation” just ahead. But unlike them, Jehovah’s Witnesses have abandoned Babylon the Great, the world empire of false religion, and are preaching the Kingdom message in 203 lands. This unparalleled work is an outstanding feature of “the sign” proving that in 1914 Jesus was installed as heavenly King, to rule amid his enemies.—Matthew 24:3, 14, 21; Psalm 110:1, 2; Revelation 18:1-5.