Explore the intricacies of 1-form symmetries and the phase diagram of Yang-Mills theory in this 46-minute conference talk by Davide Gaiotto from the Perimeter Institute. Delve into topics such as color confinement, flux tubes, and large N gauge theories as part of the Confinement, Flux Tubes, and Large N KITP conference. Examine the theta angle and its relation to phase transitions and PSU(N), gain insights from the lattice perspective, and investigate 1-form symmetry, two-form background, and line defects in Yang-Mills theory. Analyze the Witten effect, finite temperature considerations, and the mixed gauge theory phase diagram to deepen your understanding of these fundamental concepts in theoretical physics.