YouTube is reintroducing its private messaging feature, which was discontinued in 2019, to a select group of users aged 18 and older in Ireland and Poland. Users can share videos, including long-form videos, Shorts, and livestreams, within the mobile app through a full-screen chat interface accessed via the Share button. The feature supports one-on-one conversations and group chats, allowing users to respond with text, videos, or emojis. To ensure user safety, participants must send invites to chat, can unsend messages, block users, and report violations. YouTube will monitor messages for compliance with Community Guidelines.