This study aims to analyze the use of YouTube as a means of transforming Islamic da'wah in the digital era, by taking a case study of the digital da'wah practice of Ustadz Dr. Aam Amiruddin, M.Si. through the Percikan Iman YouTube channel. The development of information and communication technology has brought significant changes in the methods and patterns of da'wah communication, from conventional to more digital, interactive, and flexible. YouTube as an audio-visual-based platform has great potential in conveying religious messages widely without the limitations of space and time. This study uses a qualitative descriptive approach based on the 4C Theory (context, communication, collaboration, connection) to understand the effectiveness of using social media in da'wah. The research results show that the use of YouTube in Islamic preaching, as practiced by Ustadz Aam Amiruddin through regular programs such as Percikan Iman Pagi and Bedah Masalah, is able to increase audience reach, present a more creative variety of content, and build more intense interactions between preachers and the community. The transformation of preaching is evident in changes in delivery methods, a more relaxed and adaptive communication style, and more active audience engagement. However, on the other hand, there are challenges such as competition with entertainment content, the risk of spreading invalid information, and the importance of maintaining ethics in preaching on digital media. Thus, the success of preaching through YouTube is largely determined by the preacher's ability to manage content creatively, consistently, and credibly.