Toggle on available experiments (e.g., smart zoom, modified lock screens). 2. Google App Testing Program

Joining is difficult because the program is almost always . However, here is the standard process: 1. Install TestFlight

To join the via TestFlight (iOS), you need to use a public invitation link or receive an email invite directly from Google. Note that YouTube's beta slots for iOS are extremely limited and are frequently full. Steps to Join YouTube Beta on iOS