YouTube, the world's largest video sharing platform, has become a key component of modern digital culture. It is not only a source of entertainment, but also an important platform for information dissemination, education, and social interaction. This paper aims to deeply analyze the multidimensional features of YouTube and explore its far-reaching impact on global culture, society and economy. Historical Evolution of YouTube YouTube's Unique Functions and Features YouTube's Global Impact Challenges and Controversies Facing Conclusion YouTube has...