This fast-paced educational video explores the Protestant Reformation, a pivotal movement in European history initiated by Martin Luther in the 16th century. Hosted by John Green, the video details how religious grievances regarding the Catholic Church—specifically the sale of indulgences and the power of the Papacy—morphed into a theological revolution. It explains Luther's core doctrines of "Sola Fide" (faith alone) and "Sola Scriptura" (scripture alone), and how the printing press facilitated the rapid spread of these ideas beyond Germany to the rest of Europe. The video delves into the political and social consequences of the Reformation, including the Diet of Worms, the protection of Luther by German princes like Frederick the Wise, and the violent German Peasants' War. It also introduces other key reformers like Ulrich Zwingli and the radical Anabaptists, highlighting theological disagreements over rituals like the Eucharist and Baptism. The narrative covers the intersection of faith and politics, showing how leaders used religious reform to challenge the authority of the Holy Roman Emperor, Charles V. Ideal for high school history classrooms, this resource helps students understand the complexity of religious conflict. It moves beyond simple dates and names to explore the motivations behind the Reformation and its lasting impact on Western society. Teachers can use this video to discuss the relationship between technology (media) and social change, the distinction between religious and political power, and how historical figures can be both revolutionary and conservative in different contexts.