YouTube is rolling out a new in-app messaging system that allows users to share videos, Shorts, and livestreams and engage in one-on-one conversations. A messaging icon will appear in the top-right corner of the app, and users can invite others via a URL link valid for seven days, shared through a third-party platform. Recipients must choose to allow messaging or decline. The feature is for users aged 18 and older and adheres to Community Guidelines. Users can unsend messages, block individuals, and report inappropriate content. Initially tested in Europe, it is now available in the United States, the United Kingdom, Brazil, and Singapore.