In the digital age, technology has become essential for online learning and teaching for learners at all levels of education. YouTube is highly popular amongst young people in Hong Kong and across the globe. In foreign language acquisition, how do learners perceive the use of YouTube for English learning in out-of-class settings? This book reports the findings of a case study of learners at a university in Hong Kong from students' perspectives. The detailed, qualitative study adopts a narrative inquiry approach in order to examine students' perceptions, factors shaping them, and the extent to which perceptions affect language learning practices on YouTube. The implications highlighted here include developing five qualities for learners that facilitate autonomous and experiential learning out-of-class, training that supplements in-class learning, and whole-person development. The findings shed light on understanding students' needs and interests for an improved quality of language teaching that meets the challenges of the twenty-first century.