It means you need to update the app and find out 😉
Discussion
I’m running the latest version. I just don’t know what that terminology means lol
Are you on TestFlight? Videos look amazing!
It means edge of screen to edge of screen. Ie- in the new test flight instead of the video being within a box on the original post, it fills the screen from left edge to right edge. Good for content creators as it means their stuff is viewed larger :-)