Plz add re-center button To make this perfect, you need a button to recenter the screen otherwise it will drift very fast
1. Change the default screen size
2. Put it on the video play list for user could select.
3. Fix some bugs.
1. Re-center the screen on every 30 second. Thanks Hùng Đỗ Thành
2. Press Button B of Bluetooth controller of Unicorn viewer to re-center the screen.