What does "be willing to" mean?
The phrase “be willing to” gets its meaning from the adjective “willing.” The adjective “willing” means to be ready, eager or prepared to do something. The idea is just that you don’t need to be persuaded. So the question in the video is "how uncomfortable are you willing to become in order to reach your fullest potential?" In other words, what are you ready or prepared to do to become a better person? Ex: What are you willing to do to improve your English? Ex: I'm willing to do anything to pass my exams.