ReVanced is a popular modding tool for enhancing Android apps like YouTube, offering features such as ad-blocking, background playback, and customizable themes. Unlike YouTube Premium, it’s free but requires technical know-how for patching. Its open-source nature and compatibility with non-rooted devices make it accessible. However, users should be cautious about security risks and terms-of-service violations when using modded apps. Always download from official sources to stay safe.