YouTube is testing something called Tamba.
Android Authority found icons and references to “Tamba” in the latest YouTube APK. The code mentions followers, follow requests, direct messages, group chats, posts, and voice replies, suggesting it’s a social feature. But the “sandbox” label in the code suggests it could be a testing ground for experimental social features rather than a finished product. [Link: YouTube is cooking up something new called 'Tamba,' and it looks pretty social | https://www.androidauthority.com/youtube-tamba-sandbox-social-app-apk-teardown-3731409/ | Android Authority]